Merge pull request #11544 from BoboTiG/fix-invalid-seq-warnings

Fix several DeprecationWarning: invalid escape sequence

IPython/sphinxext/ipython_directive.py

@@ -1,1248 +1,1248 b''
 # -*- coding: utf-8 -*-
 """
 Sphinx directive to support embedded IPython code.
 
 IPython provides an extension for `Sphinx <http://www.sphinx-doc.org/>`_ to
 highlight and run code.
 
 This directive allows pasting of entire interactive IPython sessions, prompts
 and all, and their code will actually get re-executed at doc build time, with
 all prompts renumbered sequentially. It also allows you to input code as a pure
 python input by giving the argument python to the directive. The output looks
 like an interactive ipython section.
 
 Here is an example of how the IPython directive can
 **run** python code, at build time.
 
 .. ipython::
 
    In [1]: 1+1
 
    In [1]: import datetime
       ...: datetime.datetime.now()
 
 It supports IPython construct that plain
 Python does not understand (like magics):
 
 .. ipython::
 
    In [0]: import time
 
    In [0]: %timeit time.sleep(0.05)
 
 This will also support top-level async when using IPython 7.0+
 
 .. ipython::
 
    In [2]: import asyncio
       ...: print('before')
       ...: await asyncio.sleep(1)
       ...: print('after')
 
 
 The namespace will persist across multiple code chucks, Let's define a variable:
 
 .. ipython::
 
    In [0]: who = "World"
 
 And now say hello:
 
 .. ipython::
 
    In [0]: print('Hello,', who)
 
 If the current section raises an exception, you can add the ``:okexcept:`` flag
 to the current block, otherwise the build will fail.
 
 .. ipython::
    :okexcept:
 
    In [1]: 1/0
 
 IPython Sphinx directive module
 ===============================
 
 To enable this directive, simply list it in your Sphinx ``conf.py`` file
 (making sure the directory where you placed it is visible to sphinx, as is
 needed for all Sphinx directives). For example, to enable syntax highlighting
 and the IPython directive::
 
     extensions = ['IPython.sphinxext.ipython_console_highlighting',
                   'IPython.sphinxext.ipython_directive']
 
 The IPython directive outputs code-blocks with the language 'ipython'. So
 if you do not have the syntax highlighting extension enabled as well, then
 all rendered code-blocks will be uncolored. By default this directive assumes
 that your prompts are unchanged IPython ones, but this can be customized.
 The configurable options that can be placed in conf.py are:
 
 ipython_savefig_dir:
     The directory in which to save the figures. This is relative to the
     Sphinx source directory. The default is `html_static_path`.
 ipython_rgxin:
     The compiled regular expression to denote the start of IPython input
-    lines. The default is ``re.compile('In \[(\d+)\]:\s?(.*)\s*')``. You
+    lines. The default is ``re.compile('In \\[(\\d+)\\]:\\s?(.*)\\s*')``. You
     shouldn't need to change this.
 ipython_warning_is_error: [default to True]
     Fail the build if something unexpected happen, for example if a block raise
     an exception but does not have the `:okexcept:` flag. The exact behavior of
     what is considered strict, may change between the sphinx directive version.
 ipython_rgxout:
     The compiled regular expression to denote the start of IPython output
-    lines. The default is ``re.compile('Out\[(\d+)\]:\s?(.*)\s*')``. You
+    lines. The default is ``re.compile('Out\\[(\\d+)\\]:\\s?(.*)\\s*')``. You
     shouldn't need to change this.
 ipython_promptin:
     The string to represent the IPython input prompt in the generated ReST.
     The default is ``'In [%d]:'``. This expects that the line numbers are used
     in the prompt.
 ipython_promptout:
     The string to represent the IPython prompt in the generated ReST. The
     default is ``'Out [%d]:'``. This expects that the line numbers are used
     in the prompt.
 ipython_mplbackend:
     The string which specifies if the embedded Sphinx shell should import
     Matplotlib and set the backend. The value specifies a backend that is
     passed to `matplotlib.use()` before any lines in `ipython_execlines` are
     executed. If not specified in conf.py, then the default value of 'agg' is
     used. To use the IPython directive without matplotlib as a dependency, set
     the value to `None`. It may end up that matplotlib is still imported
     if the user specifies so in `ipython_execlines` or makes use of the
     @savefig pseudo decorator.
 ipython_execlines:
     A list of strings to be exec'd in the embedded Sphinx shell. Typical
     usage is to make certain packages always available. Set this to an empty
     list if you wish to have no imports always available. If specified in
     ``conf.py`` as `None`, then it has the effect of making no imports available.
     If omitted from conf.py altogether, then the default value of
     ['import numpy as np', 'import matplotlib.pyplot as plt'] is used.
 ipython_holdcount
     When the @suppress pseudo-decorator is used, the execution count can be
     incremented or not. The default behavior is to hold the execution count,
     corresponding to a value of `True`. Set this to `False` to increment
     the execution count after each suppressed command.
 
 As an example, to use the IPython directive when `matplotlib` is not available,
 one sets the backend to `None`::
 
     ipython_mplbackend = None
 
 An example usage of the directive is:
 
 .. code-block:: rst
 
     .. ipython::
 
         In [1]: x = 1
 
         In [2]: y = x**2
 
         In [3]: print(y)
 
 See http://matplotlib.org/sampledoc/ipython_directive.html for additional
 documentation.
 
 Pseudo-Decorators
 =================
 
 Note: Only one decorator is supported per input. If more than one decorator
 is specified, then only the last one is used.
 
 In addition to the Pseudo-Decorators/options described at the above link,
 several enhancements have been made. The directive will emit a message to the
 console at build-time if code-execution resulted in an exception or warning.
 You can suppress these on a per-block basis by specifying the :okexcept:
 or :okwarning: options:
 
 .. code-block:: rst
 
     .. ipython::
         :okexcept:
         :okwarning:
 
         In [1]: 1/0
         In [2]: # raise warning.
 
 To Do
 =====
 
 - Turn the ad-hoc test() function into a real test suite.
 - Break up ipython-specific functionality from matplotlib stuff into better
   separated code.
 
 """
 
 # Authors
 # =======
 # 
 # - John D Hunter: original author.
 # - Fernando Perez: refactoring, documentation, cleanups, port to 0.11.
 # - VáclavŠmilauer <eudoxos-AT-arcig.cz>: Prompt generalizations.
 # - Skipper Seabold, refactoring, cleanups, pure python addition
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 # Stdlib
 import atexit
 import errno
 import os
 import re
 import sys
 import tempfile
 import ast
 import warnings
 import shutil
 from io import StringIO
 
 # Third-party
 from docutils.parsers.rst import directives
 from docutils.parsers.rst import Directive
 
 # Our own
 from traitlets.config import Config
 from IPython import InteractiveShell
 from IPython.core.profiledir import ProfileDir
 
 use_matpltolib = False
 try:
     import matplotlib
     use_matpltolib = True
 except Exception:
     pass
 
 #-----------------------------------------------------------------------------
 # Globals
 #-----------------------------------------------------------------------------
 # for tokenizing blocks
 COMMENT, INPUT, OUTPUT =  range(3)
 
 #-----------------------------------------------------------------------------
 # Functions and class declarations
 #-----------------------------------------------------------------------------
 
 def block_parser(part, rgxin, rgxout, fmtin, fmtout):
     """
     part is a string of ipython text, comprised of at most one
     input, one output, comments, and blank lines.  The block parser
     parses the text into a list of::
 
       blocks = [ (TOKEN0, data0), (TOKEN1, data1), ...]
 
     where TOKEN is one of [COMMENT | INPUT | OUTPUT ] and
     data is, depending on the type of token::
 
       COMMENT : the comment string
 
       INPUT: the (DECORATOR, INPUT_LINE, REST) where
          DECORATOR: the input decorator (or None)
          INPUT_LINE: the input as string (possibly multi-line)
          REST : any stdout generated by the input line (not OUTPUT)
 
       OUTPUT: the output string, possibly multi-line
 
     """
     block = []
     lines = part.split('\n')
     N = len(lines)
     i = 0
     decorator = None
     while 1:
 
         if i==N:
             # nothing left to parse -- the last line
             break
 
         line = lines[i]
         i += 1
         line_stripped = line.strip()
         if line_stripped.startswith('#'):
             block.append((COMMENT, line))
             continue
 
         if line_stripped.startswith('@'):
             # Here is where we assume there is, at most, one decorator.
             # Might need to rethink this.
             decorator = line_stripped
             continue
 
         # does this look like an input line?
         matchin = rgxin.match(line)
         if matchin:
             lineno, inputline = int(matchin.group(1)), matchin.group(2)
 
             # the ....: continuation string
             continuation = '   %s:'%''.join(['.']*(len(str(lineno))+2))
             Nc = len(continuation)
             # input lines can continue on for more than one line, if
             # we have a '\' line continuation char or a function call
             # echo line 'print'.  The input line can only be
             # terminated by the end of the block or an output line, so
             # we parse out the rest of the input line if it is
             # multiline as well as any echo text
 
             rest = []
             while i<N:
 
                 # look ahead; if the next line is blank, or a comment, or
                 # an output line, we're done
 
                 nextline = lines[i]
                 matchout = rgxout.match(nextline)
                 #print "nextline=%s, continuation=%s, starts=%s"%(nextline, continuation, nextline.startswith(continuation))
                 if matchout or nextline.startswith('#'):
                     break
                 elif nextline.startswith(continuation):
                     # The default ipython_rgx* treat the space following the colon as optional.
                     # However, If the space is there we must consume it or code
                     # employing the cython_magic extension will fail to execute.
                     #
                     # This works with the default ipython_rgx* patterns,
                     # If you modify them, YMMV.
                     nextline = nextline[Nc:]
                     if nextline and nextline[0] == ' ':
                         nextline = nextline[1:]
 
                     inputline += '\n' +  nextline
                 else:
                     rest.append(nextline)
                 i+= 1
 
             block.append((INPUT, (decorator, inputline, '\n'.join(rest))))
             continue
 
         # if it looks like an output line grab all the text to the end
         # of the block
         matchout = rgxout.match(line)
         if matchout:
             lineno, output = int(matchout.group(1)), matchout.group(2)
             if i<N-1:
                 output = '\n'.join([output] + lines[i:])
 
             block.append((OUTPUT, output))
             break
 
     return block
 
 
 class EmbeddedSphinxShell(object):
     """An embedded IPython instance to run inside Sphinx"""
 
     def __init__(self, exec_lines=None):
 
         self.cout = StringIO()
 
         if exec_lines is None:
             exec_lines = []
 
         # Create config object for IPython
         config = Config()
         config.HistoryManager.hist_file = ':memory:'
         config.InteractiveShell.autocall = False
         config.InteractiveShell.autoindent = False
         config.InteractiveShell.colors = 'NoColor'
 
         # create a profile so instance history isn't saved
         tmp_profile_dir = tempfile.mkdtemp(prefix='profile_')
         profname = 'auto_profile_sphinx_build'
         pdir = os.path.join(tmp_profile_dir,profname)
         profile = ProfileDir.create_profile_dir(pdir)
 
         # Create and initialize global ipython, but don't start its mainloop.
         # This will persist across different EmbeddedSphinxShell instances.
         IP = InteractiveShell.instance(config=config, profile_dir=profile)
         atexit.register(self.cleanup)
 
         # Store a few parts of IPython we'll need.
         self.IP = IP
         self.user_ns = self.IP.user_ns
         self.user_global_ns = self.IP.user_global_ns
 
         self.input = ''
         self.output = ''
         self.tmp_profile_dir = tmp_profile_dir
 
         self.is_verbatim = False
         self.is_doctest = False
         self.is_suppress = False
 
         # Optionally, provide more detailed information to shell.
         # this is assigned by the SetUp method of IPythonDirective
         # to point at itself.
         #
         # So, you can access handy things at self.directive.state
         self.directive = None
 
         # on the first call to the savefig decorator, we'll import
         # pyplot as plt so we can make a call to the plt.gcf().savefig
         self._pyplot_imported = False
 
         # Prepopulate the namespace.
         for line in exec_lines:
             self.process_input_line(line, store_history=False)
 
     def cleanup(self):
         shutil.rmtree(self.tmp_profile_dir, ignore_errors=True)
 
     def clear_cout(self):
         self.cout.seek(0)
         self.cout.truncate(0)
 
     def process_input_line(self, line, store_history):
         return self.process_input_lines([line], store_history=store_history)
 
     def process_input_lines(self, lines, store_history=True):
         """process the input, capturing stdout"""
         stdout = sys.stdout
         source_raw = '\n'.join(lines)
         try:
             sys.stdout = self.cout
             self.IP.run_cell(source_raw, store_history=store_history)
         finally:
             sys.stdout = stdout
 
     def process_image(self, decorator):
         """
         # build out an image directive like
         # .. image:: somefile.png
         #    :width 4in
         #
         # from an input like
         # savefig somefile.png width=4in
         """
         savefig_dir = self.savefig_dir
         source_dir = self.source_dir
         saveargs = decorator.split(' ')
         filename = saveargs[1]
         # insert relative path to image file in source (as absolute path for Sphinx)
         outfile = '/' + os.path.relpath(os.path.join(savefig_dir,filename),
                                         source_dir)
 
         imagerows = ['.. image:: %s'%outfile]
 
         for kwarg in saveargs[2:]:
             arg, val = kwarg.split('=')
             arg = arg.strip()
             val = val.strip()
             imagerows.append('   :%s: %s'%(arg, val))
 
         image_file = os.path.basename(outfile) # only return file name
         image_directive = '\n'.join(imagerows)
         return image_file, image_directive
 
     # Callbacks for each type of token
     def process_input(self, data, input_prompt, lineno):
         """
         Process data block for INPUT token.
 
         """
         decorator, input, rest = data
         image_file = None
         image_directive = None
 
         is_verbatim = decorator=='@verbatim' or self.is_verbatim
         is_doctest = (decorator is not None and \
                      decorator.startswith('@doctest')) or self.is_doctest
         is_suppress = decorator=='@suppress' or self.is_suppress
         is_okexcept = decorator=='@okexcept' or self.is_okexcept
         is_okwarning = decorator=='@okwarning' or self.is_okwarning
         is_savefig = decorator is not None and \
                      decorator.startswith('@savefig')
 
         input_lines = input.split('\n')
         if len(input_lines) > 1:
             if input_lines[-1] != "":
                 input_lines.append('') # make sure there's a blank line
                                        # so splitter buffer gets reset
 
         continuation = '   %s:'%''.join(['.']*(len(str(lineno))+2))
 
         if is_savefig:
             image_file, image_directive = self.process_image(decorator)
 
         ret = []
         is_semicolon = False
 
         # Hold the execution count, if requested to do so.
         if is_suppress and self.hold_count:
             store_history = False
         else:
             store_history = True
 
         # Note: catch_warnings is not thread safe
         with warnings.catch_warnings(record=True) as ws:
             if input_lines[0].endswith(';'):
                 is_semicolon = True
             #for i, line in enumerate(input_lines):
 
             # process the first input line
             if is_verbatim:
                 self.process_input_lines([''])
                 self.IP.execution_count += 1 # increment it anyway
             else:
                 # only submit the line in non-verbatim mode
                 self.process_input_lines(input_lines, store_history=store_history)
 
         if not is_suppress:
             for i, line in enumerate(input_lines):
                 if i == 0:
                     formatted_line = '%s %s'%(input_prompt, line)
                 else:
                     formatted_line = '%s %s'%(continuation, line)
                 ret.append(formatted_line)
 
         if not is_suppress and len(rest.strip()) and is_verbatim:
             # The "rest" is the standard output of the input. This needs to be
             # added when in verbatim mode. If there is no "rest", then we don't
             # add it, as the new line will be added by the processed output.
             ret.append(rest)
 
         # Fetch the processed output. (This is not the submitted output.)
         self.cout.seek(0)
         processed_output = self.cout.read()
         if not is_suppress and not is_semicolon:
             #
             # In IPythonDirective.run, the elements of `ret` are eventually
             # combined such that '' entries correspond to newlines. So if
             # `processed_output` is equal to '', then the adding it to `ret`
             # ensures that there is a blank line between consecutive inputs
             # that have no outputs, as in:
             #
             #    In [1]: x = 4
             #
             #    In [2]: x = 5
             #
             # When there is processed output, it has a '\n' at the tail end. So
             # adding the output to `ret` will provide the necessary spacing
             # between consecutive input/output blocks, as in:
             #
             #   In [1]: x
             #   Out[1]: 5
             #
             #   In [2]: x
             #   Out[2]: 5
             #
             # When there is stdout from the input, it also has a '\n' at the
             # tail end, and so this ensures proper spacing as well. E.g.:
             #
             #   In [1]: print x
             #   5
             #
             #   In [2]: x = 5
             #
             # When in verbatim mode, `processed_output` is empty (because
             # nothing was passed to IP. Sometimes the submitted code block has
             # an Out[] portion and sometimes it does not. When it does not, we
             # need to ensure proper spacing, so we have to add '' to `ret`.
             # However, if there is an Out[] in the submitted code, then we do
             # not want to add a newline as `process_output` has stuff to add.
             # The difficulty is that `process_input` doesn't know if
             # `process_output` will be called---so it doesn't know if there is
             # Out[] in the code block. The requires that we include a hack in
             # `process_block`. See the comments there.
             #
             ret.append(processed_output)
         elif is_semicolon:
             # Make sure there is a newline after the semicolon.
             ret.append('')
 
         # context information
         filename = "Unknown"
         lineno = 0
         if self.directive.state:
             filename = self.directive.state.document.current_source
             lineno = self.directive.state.document.current_line
 
         # output any exceptions raised during execution to stdout
         # unless :okexcept: has been specified.
         if not is_okexcept and (("Traceback" in processed_output) or ("SyntaxError" in processed_output)):
             s =  "\nException in %s at block ending on line %s\n" % (filename, lineno)
             s += "Specify :okexcept: as an option in the ipython:: block to suppress this message\n"
             sys.stdout.write('\n\n>>>' + ('-' * 73))
             sys.stdout.write(s)
             sys.stdout.write(processed_output)
             sys.stdout.write('<<<' + ('-' * 73) + '\n\n')
             if self.warning_is_error:
                 raise RuntimeError('Non Expected exception in `{}` line {}'.format(filename, lineno))
 
         # output any warning raised during execution to stdout
         # unless :okwarning: has been specified.
         if not is_okwarning:
             for w in ws:
                 s =  "\nWarning in %s at block ending on line %s\n" % (filename, lineno)
                 s += "Specify :okwarning: as an option in the ipython:: block to suppress this message\n"
                 sys.stdout.write('\n\n>>>' + ('-' * 73))
                 sys.stdout.write(s)
                 sys.stdout.write(('-' * 76) + '\n')
                 s=warnings.formatwarning(w.message, w.category,
                                          w.filename, w.lineno, w.line)
                 sys.stdout.write(s)
                 sys.stdout.write('<<<' + ('-' * 73) + '\n')
                 if self.warning_is_error:
                     raise RuntimeError('Non Expected warning in `{}` line {}'.format(filename, lineno))
 
         self.cout.truncate(0)
         return (ret, input_lines, processed_output,
                 is_doctest, decorator, image_file, image_directive)
 
 
     def process_output(self, data, output_prompt, input_lines, output,
                        is_doctest, decorator, image_file):
         """
         Process data block for OUTPUT token.
 
         """
         # Recall: `data` is the submitted output, and `output` is the processed
         # output from `input_lines`.
 
         TAB = ' ' * 4
 
         if is_doctest and output is not None:
 
             found = output # This is the processed output
             found = found.strip()
             submitted = data.strip()
 
             if self.directive is None:
                 source = 'Unavailable'
                 content = 'Unavailable'
             else:
                 source = self.directive.state.document.current_source
                 content = self.directive.content
                 # Add tabs and join into a single string.
                 content = '\n'.join([TAB + line for line in content])
 
             # Make sure the output contains the output prompt.
             ind = found.find(output_prompt)
             if ind < 0:
                 e = ('output does not contain output prompt\n\n'
                      'Document source: {0}\n\n'
                      'Raw content: \n{1}\n\n'
                      'Input line(s):\n{TAB}{2}\n\n'
                      'Output line(s):\n{TAB}{3}\n\n')
                 e = e.format(source, content, '\n'.join(input_lines),
                              repr(found), TAB=TAB)
                 raise RuntimeError(e)
             found = found[len(output_prompt):].strip()
 
             # Handle the actual doctest comparison.
             if decorator.strip() == '@doctest':
                 # Standard doctest
                 if found != submitted:
                     e = ('doctest failure\n\n'
                          'Document source: {0}\n\n'
                          'Raw content: \n{1}\n\n'
                          'On input line(s):\n{TAB}{2}\n\n'
                          'we found output:\n{TAB}{3}\n\n'
                          'instead of the expected:\n{TAB}{4}\n\n')
                     e = e.format(source, content, '\n'.join(input_lines),
                                  repr(found), repr(submitted), TAB=TAB)
                     raise RuntimeError(e)
             else:
                 self.custom_doctest(decorator, input_lines, found, submitted)
 
         # When in verbatim mode, this holds additional submitted output
         # to be written in the final Sphinx output.
         # https://github.com/ipython/ipython/issues/5776
         out_data = []
 
         is_verbatim = decorator=='@verbatim' or self.is_verbatim
         if is_verbatim and data.strip():
             # Note that `ret` in `process_block` has '' as its last element if
             # the code block was in verbatim mode. So if there is no submitted
             # output, then we will have proper spacing only if we do not add
             # an additional '' to `out_data`. This is why we condition on
             # `and data.strip()`.
 
             # The submitted output has no output prompt. If we want the
             # prompt and the code to appear, we need to join them now
             # instead of adding them separately---as this would create an
             # undesired newline. How we do this ultimately depends on the
             # format of the output regex. I'll do what works for the default
             # prompt for now, and we might have to adjust if it doesn't work
             # in other cases. Finally, the submitted output does not have
             # a trailing newline, so we must add it manually.
             out_data.append("{0} {1}\n".format(output_prompt, data))
 
         return out_data
 
     def process_comment(self, data):
         """Process data fPblock for COMMENT token."""
         if not self.is_suppress:
             return [data]
 
     def save_image(self, image_file):
         """
         Saves the image file to disk.
         """
         self.ensure_pyplot()
         command = 'plt.gcf().savefig("%s")'%image_file
         #print 'SAVEFIG', command  # dbg
         self.process_input_line('bookmark ipy_thisdir', store_history=False)
         self.process_input_line('cd -b ipy_savedir', store_history=False)
         self.process_input_line(command, store_history=False)
         self.process_input_line('cd -b ipy_thisdir', store_history=False)
         self.process_input_line('bookmark -d ipy_thisdir', store_history=False)
         self.clear_cout()
 
     def process_block(self, block):
         """
         process block from the block_parser and return a list of processed lines
         """
         ret = []
         output = None
         input_lines = None
         lineno = self.IP.execution_count
 
         input_prompt = self.promptin % lineno
         output_prompt = self.promptout % lineno
         image_file = None
         image_directive = None
 
         found_input = False
         for token, data in block:
             if token == COMMENT:
                 out_data = self.process_comment(data)
             elif token == INPUT:
                 found_input = True
                 (out_data, input_lines, output, is_doctest,
                  decorator, image_file, image_directive) = \
                           self.process_input(data, input_prompt, lineno)
             elif token == OUTPUT:
                 if not found_input:
 
                     TAB = ' ' * 4
                     linenumber = 0
                     source = 'Unavailable'
                     content = 'Unavailable'
                     if self.directive:
                         linenumber = self.directive.state.document.current_line
                         source = self.directive.state.document.current_source
                         content = self.directive.content
                         # Add tabs and join into a single string.
                         content = '\n'.join([TAB + line for line in content])
 
                     e = ('\n\nInvalid block: Block contains an output prompt '
                          'without an input prompt.\n\n'
                          'Document source: {0}\n\n'
                          'Content begins at line {1}: \n\n{2}\n\n'
                          'Problematic block within content: \n\n{TAB}{3}\n\n')
                     e = e.format(source, linenumber, content, block, TAB=TAB)
 
                     # Write, rather than include in exception, since Sphinx
                     # will truncate tracebacks.
                     sys.stdout.write(e)
                     raise RuntimeError('An invalid block was detected.')
                 out_data = \
                     self.process_output(data, output_prompt, input_lines,
                                         output, is_doctest, decorator,
                                         image_file)
                 if out_data:
                     # Then there was user submitted output in verbatim mode.
                     # We need to remove the last element of `ret` that was
                     # added in `process_input`, as it is '' and would introduce
                     # an undesirable newline.
                     assert(ret[-1] == '')
                     del ret[-1]
 
             if out_data:
                 ret.extend(out_data)
 
         # save the image files
         if image_file is not None:
             self.save_image(image_file)
 
         return ret, image_directive
 
     def ensure_pyplot(self):
         """
         Ensures that pyplot has been imported into the embedded IPython shell.
 
         Also, makes sure to set the backend appropriately if not set already.
 
         """
         # We are here if the @figure pseudo decorator was used. Thus, it's
         # possible that we could be here even if python_mplbackend were set to
         # `None`. That's also strange and perhaps worthy of raising an
         # exception, but for now, we just set the backend to 'agg'.
 
         if not self._pyplot_imported:
             if 'matplotlib.backends' not in sys.modules:
                 # Then ipython_matplotlib was set to None but there was a
                 # call to the @figure decorator (and ipython_execlines did
                 # not set a backend).
                 #raise Exception("No backend was set, but @figure was used!")
                 import matplotlib
                 matplotlib.use('agg')
 
             # Always import pyplot into embedded shell.
             self.process_input_line('import matplotlib.pyplot as plt',
                                     store_history=False)
             self._pyplot_imported = True
 
     def process_pure_python(self, content):
         """
         content is a list of strings. it is unedited directive content
 
         This runs it line by line in the InteractiveShell, prepends
         prompts as needed capturing stderr and stdout, then returns
         the content as a list as if it were ipython code
         """
         output = []
         savefig = False # keep up with this to clear figure
         multiline = False # to handle line continuation
         multiline_start = None
         fmtin = self.promptin
 
         ct = 0
 
         for lineno, line in enumerate(content):
 
             line_stripped = line.strip()
             if not len(line):
                 output.append(line)
                 continue
 
             # handle decorators
             if line_stripped.startswith('@'):
                 output.extend([line])
                 if 'savefig' in line:
                     savefig = True # and need to clear figure
                 continue
 
             # handle comments
             if line_stripped.startswith('#'):
                 output.extend([line])
                 continue
 
             # deal with lines checking for multiline
             continuation  = u'   %s:'% ''.join(['.']*(len(str(ct))+2))
             if not multiline:
                 modified = u"%s %s" % (fmtin % ct, line_stripped)
                 output.append(modified)
                 ct += 1
                 try:
                     ast.parse(line_stripped)
                     output.append(u'')
                 except Exception: # on a multiline
                     multiline = True
                     multiline_start = lineno
             else: # still on a multiline
                 modified = u'%s %s' % (continuation, line)
                 output.append(modified)
 
                 # if the next line is indented, it should be part of multiline
                 if len(content) > lineno + 1:
                     nextline = content[lineno + 1]
                     if len(nextline) - len(nextline.lstrip()) > 3:
                         continue
                 try:
                     mod = ast.parse(
                             '\n'.join(content[multiline_start:lineno+1]))
                     if isinstance(mod.body[0], ast.FunctionDef):
                         # check to see if we have the whole function
                         for element in mod.body[0].body:
                             if isinstance(element, ast.Return):
                                 multiline = False
                     else:
                         output.append(u'')
                         multiline = False
                 except Exception:
                     pass
 
             if savefig: # clear figure if plotted
                 self.ensure_pyplot()
                 self.process_input_line('plt.clf()', store_history=False)
                 self.clear_cout()
                 savefig = False
 
         return output
 
     def custom_doctest(self, decorator, input_lines, found, submitted):
         """
         Perform a specialized doctest.
 
         """
         from .custom_doctests import doctests
 
         args = decorator.split()
         doctest_type = args[1]
         if doctest_type in doctests:
             doctests[doctest_type](self, args, input_lines, found, submitted)
         else:
             e = "Invalid option to @doctest: {0}".format(doctest_type)
             raise Exception(e)
 
 
 class IPythonDirective(Directive):
 
     has_content = True
     required_arguments = 0
     optional_arguments = 4 # python, suppress, verbatim, doctest
     final_argumuent_whitespace = True
     option_spec = { 'python': directives.unchanged,
                     'suppress' : directives.flag,
                     'verbatim' : directives.flag,
                     'doctest' : directives.flag,
                     'okexcept': directives.flag,
                     'okwarning': directives.flag
                   }
 
     shell = None
 
     seen_docs = set()
 
     def get_config_options(self):
         # contains sphinx configuration variables
         config = self.state.document.settings.env.config
 
         # get config variables to set figure output directory
         savefig_dir = config.ipython_savefig_dir
         source_dir = self.state.document.settings.env.srcdir
         savefig_dir = os.path.join(source_dir, savefig_dir)
 
         # get regex and prompt stuff
         rgxin      = config.ipython_rgxin
         rgxout     = config.ipython_rgxout
         warning_is_error= config.ipython_warning_is_error
         promptin   = config.ipython_promptin
         promptout  = config.ipython_promptout
         mplbackend = config.ipython_mplbackend
         exec_lines = config.ipython_execlines
         hold_count = config.ipython_holdcount
 
         return (savefig_dir, source_dir, rgxin, rgxout,
                 promptin, promptout, mplbackend, exec_lines, hold_count, warning_is_error)
 
     def setup(self):
         # Get configuration values.
         (savefig_dir, source_dir, rgxin, rgxout, promptin, promptout,
          mplbackend, exec_lines, hold_count, warning_is_error) = self.get_config_options()
 
         try:
             os.makedirs(savefig_dir)
         except OSError as e:
             if e.errno != errno.EEXIST:
                 raise
 
         if self.shell is None:
             # We will be here many times.  However, when the
             # EmbeddedSphinxShell is created, its interactive shell member
             # is the same for each instance.
 
             if mplbackend and 'matplotlib.backends' not in sys.modules and use_matpltolib:
                 import matplotlib
                 matplotlib.use(mplbackend)
 
             # Must be called after (potentially) importing matplotlib and
             # setting its backend since exec_lines might import pylab.
             self.shell = EmbeddedSphinxShell(exec_lines)
 
             # Store IPython directive to enable better error messages
             self.shell.directive = self
 
         # reset the execution count if we haven't processed this doc
         #NOTE: this may be borked if there are multiple seen_doc tmp files
         #check time stamp?
         if not self.state.document.current_source in self.seen_docs:
             self.shell.IP.history_manager.reset()
             self.shell.IP.execution_count = 1
             self.seen_docs.add(self.state.document.current_source)
 
         # and attach to shell so we don't have to pass them around
         self.shell.rgxin = rgxin
         self.shell.rgxout = rgxout
         self.shell.promptin = promptin
         self.shell.promptout = promptout
         self.shell.savefig_dir = savefig_dir
         self.shell.source_dir = source_dir
         self.shell.hold_count = hold_count
         self.shell.warning_is_error = warning_is_error
 
         # setup bookmark for saving figures directory
         self.shell.process_input_line('bookmark ipy_savedir %s'%savefig_dir,
                                       store_history=False)
         self.shell.clear_cout()
 
         return rgxin, rgxout, promptin, promptout
 
     def teardown(self):
         # delete last bookmark
         self.shell.process_input_line('bookmark -d ipy_savedir',
                                       store_history=False)
         self.shell.clear_cout()
 
     def run(self):
         debug = False
 
         #TODO, any reason block_parser can't be a method of embeddable shell
         # then we wouldn't have to carry these around
         rgxin, rgxout, promptin, promptout = self.setup()
 
         options = self.options
         self.shell.is_suppress = 'suppress' in options
         self.shell.is_doctest = 'doctest' in options
         self.shell.is_verbatim = 'verbatim' in options
         self.shell.is_okexcept = 'okexcept' in options
         self.shell.is_okwarning = 'okwarning' in options
 
         # handle pure python code
         if 'python' in self.arguments:
             content = self.content
             self.content = self.shell.process_pure_python(content)
 
         # parts consists of all text within the ipython-block.
         # Each part is an input/output block.
         parts = '\n'.join(self.content).split('\n\n')
 
         lines = ['.. code-block:: ipython', '']
         figures = []
 
         for part in parts:
             block = block_parser(part, rgxin, rgxout, promptin, promptout)
             if len(block):
                 rows, figure = self.shell.process_block(block)
                 for row in rows:
                     lines.extend(['   {0}'.format(line)
                                   for line in row.split('\n')])
 
                 if figure is not None:
                     figures.append(figure)
             else:
                 message = 'Code input with no code at {}, line {}'\
                             .format(
                                 self.state.document.current_source,
                                 self.state.document.current_line)
                 if self.shell.warning_is_error:
                     raise RuntimeError(message)
                 else:
                     warnings.warn(message)
 
         for figure in figures:
             lines.append('')
             lines.extend(figure.split('\n'))
             lines.append('')
 
         if len(lines) > 2:
             if debug:
                 print('\n'.join(lines))
             else:
                 # This has to do with input, not output. But if we comment
                 # these lines out, then no IPython code will appear in the
                 # final output.
                 self.state_machine.insert_input(
                     lines, self.state_machine.input_lines.source(0))
 
         # cleanup
         self.teardown()
 
         return []
 
 # Enable as a proper Sphinx directive
 def setup(app):
     setup.app = app
 
     app.add_directive('ipython', IPythonDirective)
     app.add_config_value('ipython_savefig_dir', 'savefig', 'env')
     app.add_config_value('ipython_warning_is_error', True, 'env')
     app.add_config_value('ipython_rgxin',
-                         re.compile('In \[(\d+)\]:\s?(.*)\s*'), 'env')
+                         re.compile(r'In \[(\d+)\]:\s?(.*)\s*'), 'env')
     app.add_config_value('ipython_rgxout',
-                         re.compile('Out\[(\d+)\]:\s?(.*)\s*'), 'env')
+                         re.compile(r'Out\[(\d+)\]:\s?(.*)\s*'), 'env')
     app.add_config_value('ipython_promptin', 'In [%d]:', 'env')
     app.add_config_value('ipython_promptout', 'Out[%d]:', 'env')
 
     # We could just let matplotlib pick whatever is specified as the default
     # backend in the matplotlibrc file, but this would cause issues if the
     # backend didn't work in headless environments. For this reason, 'agg'
     # is a good default backend choice.
     app.add_config_value('ipython_mplbackend', 'agg', 'env')
 
     # If the user sets this config value to `None`, then EmbeddedSphinxShell's
     # __init__ method will treat it as [].
     execlines = ['import numpy as np']
     if use_matpltolib:
         execlines.append('import matplotlib.pyplot as plt')
     app.add_config_value('ipython_execlines', execlines, 'env')
 
     app.add_config_value('ipython_holdcount', True, 'env')
 
     metadata = {'parallel_read_safe': True, 'parallel_write_safe': True}
     return metadata
 
 # Simple smoke test, needs to be converted to a proper automatic test.
 def test():
 
     examples = [
         r"""
 In [9]: pwd
 Out[9]: '/home/jdhunter/py4science/book'
 
 In [10]: cd bookdata/
 /home/jdhunter/py4science/book/bookdata
 
 In [2]: from pylab import *
 
 In [2]: ion()
 
 In [3]: im = imread('stinkbug.png')
 
 @savefig mystinkbug.png width=4in
 In [4]: imshow(im)
 Out[4]: <matplotlib.image.AxesImage object at 0x39ea850>
 
 """,
         r"""
 
 In [1]: x = 'hello world'
 
 # string methods can be
 # used to alter the string
 @doctest
 In [2]: x.upper()
 Out[2]: 'HELLO WORLD'
 
 @verbatim
 In [3]: x.st<TAB>
 x.startswith  x.strip
 """,
     r"""
 
 In [130]: url = 'http://ichart.finance.yahoo.com/table.csv?s=CROX\
    .....: &d=9&e=22&f=2009&g=d&a=1&br=8&c=2006&ignore=.csv'
 
 In [131]: print url.split('&')
 ['http://ichart.finance.yahoo.com/table.csv?s=CROX', 'd=9', 'e=22', 'f=2009', 'g=d', 'a=1', 'b=8', 'c=2006', 'ignore=.csv']
 
 In [60]: import urllib
 
 """,
     r"""\
 
 In [133]: import numpy.random
 
 @suppress
 In [134]: numpy.random.seed(2358)
 
 @doctest
 In [135]: numpy.random.rand(10,2)
 Out[135]:
 array([[ 0.64524308,  0.59943846],
        [ 0.47102322,  0.8715456 ],
        [ 0.29370834,  0.74776844],
        [ 0.99539577,  0.1313423 ],
        [ 0.16250302,  0.21103583],
        [ 0.81626524,  0.1312433 ],
        [ 0.67338089,  0.72302393],
        [ 0.7566368 ,  0.07033696],
        [ 0.22591016,  0.77731835],
        [ 0.0072729 ,  0.34273127]])
 
 """,
 
     r"""
 In [106]: print x
 jdh
 
 In [109]: for i in range(10):
    .....:     print i
    .....:
    .....:
 0
 1
 2
 3
 4
 5
 6
 7
 8
 9
 """,
 
         r"""
 
 In [144]: from pylab import *
 
 In [145]: ion()
 
 # use a semicolon to suppress the output
 @savefig test_hist.png width=4in
 In [151]: hist(np.random.randn(10000), 100);
 
 
 @savefig test_plot.png width=4in
 In [151]: plot(np.random.randn(10000), 'o');
    """,
 
         r"""
 # use a semicolon to suppress the output
 In [151]: plt.clf()
 
 @savefig plot_simple.png width=4in
 In [151]: plot([1,2,3])
 
 @savefig hist_simple.png width=4in
 In [151]: hist(np.random.randn(10000), 100);
 
 """,
      r"""
 # update the current fig
 In [151]: ylabel('number')
 
 In [152]: title('normal distribution')
 
 
 @savefig hist_with_text.png
 In [153]: grid(True)
 
 @doctest float
 In [154]: 0.1 + 0.2
 Out[154]: 0.3
 
 @doctest float
 In [155]: np.arange(16).reshape(4,4)
 Out[155]:
 array([[ 0,  1,  2,  3],
        [ 4,  5,  6,  7],
        [ 8,  9, 10, 11],
        [12, 13, 14, 15]])
 
 In [1]: x = np.arange(16, dtype=float).reshape(4,4)
 
 In [2]: x[0,0] = np.inf
 
 In [3]: x[0,1] = np.nan
 
 @doctest float
 In [4]: x
 Out[4]:
 array([[ inf,  nan,   2.,   3.],
        [  4.,   5.,   6.,   7.],
        [  8.,   9.,  10.,  11.],
        [ 12.,  13.,  14.,  15.]])
 
 
         """,
         ]
     # skip local-file depending first example:
     examples = examples[1:]
 
     #ipython_directive.DEBUG = True  # dbg
     #options = dict(suppress=True)  # dbg
     options = {}
     for example in examples:
         content = example.split('\n')
         IPythonDirective('debug', arguments=None, options=options,
                           content=content, lineno=0,
                           content_offset=None, block_text=None,
                           state=None, state_machine=None,
                           )
 
 # Run test suite as a script
 if __name__=='__main__':
     if not os.path.isdir('_static'):
         os.mkdir('_static')
     test()
     print('All OK? Check figures in _static/')

IPython/terminal/tests/test_debug_magic.py

@@ -1,74 +1,74 b''
 """Test embedding of IPython"""
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2013 The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 
 import os
 import sys
 from IPython.testing.decorators import skip_win32
 
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
 
 @skip_win32
 def test_debug_magic_passes_through_generators():
     """
     This test that we can correctly pass through frames of a generator post-mortem.
     """
     import pexpect
     import re
-    in_prompt = re.compile(b'In ?\[\\d+\]:')
+    in_prompt = re.compile(br'In ?\[\d+\]:')
     ipdb_prompt = 'ipdb>'
     env = os.environ.copy()
     child = pexpect.spawn(sys.executable, ['-m', 'IPython', '--colors=nocolor', '--simple-prompt'],
                           env=env)
     child.timeout = 2
 
     child.expect(in_prompt)
     child.sendline("def f(x):")
     child.sendline("    raise Exception")
     child.sendline("")
 
     child.expect(in_prompt)
     child.sendline("gen = (f(x) for x in [0])")
     child.sendline("")
 
     child.expect(in_prompt)
     child.sendline("for x in gen:")
     child.sendline("    pass")
     child.sendline("")
 
     child.expect('Exception:')
 
     child.expect(in_prompt)
     child.sendline(r'%debug')
     child.expect('----> 2     raise Exception')
 
     child.expect(ipdb_prompt)
     child.sendline('u')
     child.expect_exact(r'----> 1 gen = (f(x) for x in [0])')
 
     child.expect(ipdb_prompt)
     child.sendline('u')
     child.expect_exact('----> 1 for x in gen:')
 
     child.expect(ipdb_prompt)
     child.sendline('u')
     child.expect_exact('*** Oldest frame')
 
     child.expect(ipdb_prompt)
     child.sendline('exit')
 
     child.expect(in_prompt)
     child.sendline('exit')
 
     child.close()

docs/sphinxext/apigen.py

@@ -1,453 +1,453 b''
 """Attempt to generate templates for module reference with Sphinx
 
 XXX - we exclude extension modules
 
 To include extension modules, first identify them as valid in the
 ``_uri2path`` method, then handle them in the ``_parse_module`` script.
 
 We get functions and classes by parsing the text of .py files.
 Alternatively we could import the modules for discovery, and we'd have
 to do that for extension modules.  This would involve changing the
 ``_parse_module`` method to work via import and introspection, and
 might involve changing ``discover_modules`` (which determines which
 files are modules, and therefore which module URIs will be passed to
 ``_parse_module``).
 
 NOTE: this is a modified version of a script originally shipped with the
 PyMVPA project, which we've adapted for NIPY use.  PyMVPA is an MIT-licensed
 project."""
 
 
 # Stdlib imports
 import ast
 import inspect
 import os
 import re
 from importlib import import_module
 
 
 class Obj(object):
     '''Namespace to hold arbitrary information.'''
     def __init__(self, **kwargs):
         for k, v in kwargs.items():
             setattr(self, k, v)
                                         
 class FuncClsScanner(ast.NodeVisitor):
     """Scan a module for top-level functions and classes.
     
     Skips objects with an @undoc decorator, or a name starting with '_'.
     """
     def __init__(self):
         ast.NodeVisitor.__init__(self)
         self.classes = []
         self.classes_seen = set()
         self.functions = []
     
     @staticmethod
     def has_undoc_decorator(node):
         return any(isinstance(d, ast.Name) and d.id == 'undoc' \
                                 for d in node.decorator_list)
 
     def visit_If(self, node):
         if isinstance(node.test, ast.Compare) \
                 and isinstance(node.test.left, ast.Name) \
                 and node.test.left.id == '__name__':
             return   # Ignore classes defined in "if __name__ == '__main__':"
 
         self.generic_visit(node)
     
     def visit_FunctionDef(self, node):
         if not (node.name.startswith('_') or self.has_undoc_decorator(node)) \
                 and node.name not in self.functions:
             self.functions.append(node.name)
     
     def visit_ClassDef(self, node):
         if not (node.name.startswith('_') or self.has_undoc_decorator(node)) \
                 and node.name not in self.classes_seen:
             cls = Obj(name=node.name)
             cls.has_init = any(isinstance(n, ast.FunctionDef) and \
                                 n.name=='__init__' for n in node.body)
             self.classes.append(cls)
             self.classes_seen.add(node.name)
     
     def scan(self, mod):
         self.visit(mod)
         return self.functions, self.classes
 
 # Functions and classes
 class ApiDocWriter(object):
     ''' Class for automatic detection and parsing of API docs
     to Sphinx-parsable reST format'''
 
     # only separating first two levels
     rst_section_levels = ['*', '=', '-', '~', '^']
 
     def __init__(self,
                  package_name,
                  rst_extension='.rst',
                  package_skip_patterns=None,
                  module_skip_patterns=None,
                  names_from__all__=None,
                  ):
         ''' Initialize package for parsing
 
         Parameters
         ----------
         package_name : string
             Name of the top-level package.  *package_name* must be the
             name of an importable package
         rst_extension : string, optional
             Extension for reST files, default '.rst'
         package_skip_patterns : None or sequence of {strings, regexps}
             Sequence of strings giving URIs of packages to be excluded
             Operates on the package path, starting at (including) the
             first dot in the package path, after *package_name* - so,
             if *package_name* is ``sphinx``, then ``sphinx.util`` will
             result in ``.util`` being passed for earching by these
             regexps.  If is None, gives default. Default is:
-            ['\.tests$']
+            ['\\.tests$']
         module_skip_patterns : None or sequence
             Sequence of strings giving URIs of modules to be excluded
             Operates on the module name including preceding URI path,
             back to the first dot after *package_name*.  For example
             ``sphinx.util.console`` results in the string to search of
             ``.util.console``
             If is None, gives default. Default is:
-            ['\.setup$', '\._']
+            ['\\.setup$', '\\._']
         names_from__all__ : set, optional
             Modules listed in here will be scanned by doing ``from mod import *``,
             rather than finding function and class definitions by scanning the
             AST. This is intended for API modules which expose things defined in
             other files. Modules listed here must define ``__all__`` to avoid
             exposing everything they import.
         '''
         if package_skip_patterns is None:
             package_skip_patterns = ['\\.tests$']
         if module_skip_patterns is None:
             module_skip_patterns = ['\\.setup$', '\\._']
         self.package_name = package_name
         self.rst_extension = rst_extension
         self.package_skip_patterns = package_skip_patterns
         self.module_skip_patterns = module_skip_patterns
         self.names_from__all__ = names_from__all__ or set()
 
     def get_package_name(self):
         return self._package_name
 
     def set_package_name(self, package_name):
         ''' Set package_name
 
         >>> docwriter = ApiDocWriter('sphinx')
         >>> import sphinx
         >>> docwriter.root_path == sphinx.__path__[0]
         True
         >>> docwriter.package_name = 'docutils'
         >>> import docutils
         >>> docwriter.root_path == docutils.__path__[0]
         True
         '''
         # It's also possible to imagine caching the module parsing here
         self._package_name = package_name
         self.root_module = import_module(package_name)
         self.root_path = self.root_module.__path__[0]
         self.written_modules = None
 
     package_name = property(get_package_name, set_package_name, None,
                             'get/set package_name')
 
     def _uri2path(self, uri):
         ''' Convert uri to absolute filepath
 
         Parameters
         ----------
         uri : string
             URI of python module to return path for
 
         Returns
         -------
         path : None or string
             Returns None if there is no valid path for this URI
             Otherwise returns absolute file system path for URI
 
         Examples
         --------
         >>> docwriter = ApiDocWriter('sphinx')
         >>> import sphinx
         >>> modpath = sphinx.__path__[0]
         >>> res = docwriter._uri2path('sphinx.builder')
         >>> res == os.path.join(modpath, 'builder.py')
         True
         >>> res = docwriter._uri2path('sphinx')
         >>> res == os.path.join(modpath, '__init__.py')
         True
         >>> docwriter._uri2path('sphinx.does_not_exist')
 
         '''
         if uri == self.package_name:
             return os.path.join(self.root_path, '__init__.py')
         path = uri.replace('.', os.path.sep)
         path = path.replace(self.package_name + os.path.sep, '')
         path = os.path.join(self.root_path, path)
         # XXX maybe check for extensions as well?
         if os.path.exists(path + '.py'): # file
             path += '.py'
         elif os.path.exists(os.path.join(path, '__init__.py')):
             path = os.path.join(path, '__init__.py')
         else:
             return None
         return path
 
     def _path2uri(self, dirpath):
         ''' Convert directory path to uri '''
         relpath = dirpath.replace(self.root_path, self.package_name)
         if relpath.startswith(os.path.sep):
             relpath = relpath[1:]
         return relpath.replace(os.path.sep, '.')
 
     def _parse_module(self, uri):
         ''' Parse module defined in *uri* '''
         filename = self._uri2path(uri)
         if filename is None:
             # nothing that we could handle here.
             return ([],[])
         with open(filename, 'rb') as f:
             mod = ast.parse(f.read())
         return FuncClsScanner().scan(mod)
 
     def _import_funcs_classes(self, uri):
         """Import * from uri, and separate out functions and classes."""
         ns = {}
         exec('from %s import *' % uri, ns)
         funcs, classes = [], []
         for name, obj in ns.items():
             if inspect.isclass(obj):
                 cls = Obj(name=name, has_init='__init__' in obj.__dict__)
                 classes.append(cls)
             elif inspect.isfunction(obj):
                 funcs.append(name)
 
         return sorted(funcs), sorted(classes, key=lambda x: x.name)
 
     def find_funcs_classes(self, uri):
         """Find the functions and classes defined in the module ``uri``"""
         if uri in self.names_from__all__:
             # For API modules which expose things defined elsewhere, import them
             return self._import_funcs_classes(uri)
         else:
             # For other modules, scan their AST to see what they define
             return self._parse_module(uri)
 
     def generate_api_doc(self, uri):
         '''Make autodoc documentation template string for a module
 
         Parameters
         ----------
         uri : string
             python location of module - e.g 'sphinx.builder'
 
         Returns
         -------
         S : string
             Contents of API doc
         '''
         # get the names of all classes and functions
         functions, classes = self.find_funcs_classes(uri)
         if not len(functions) and not len(classes):
             #print ('WARNING: Empty -', uri)  # dbg
             return ''
 
         # Make a shorter version of the uri that omits the package name for
         # titles
         uri_short = re.sub(r'^%s\.' % self.package_name,'',uri)
 
         ad = '.. AUTO-GENERATED FILE -- DO NOT EDIT!\n\n'
 
         # Set the chapter title to read 'Module:' for all modules except for the
         # main packages
         if '.' in uri:
             chap_title = 'Module: :mod:`' + uri_short + '`'
         else:
             chap_title = ':mod:`' + uri_short + '`'
         ad += chap_title + '\n' + self.rst_section_levels[1] * len(chap_title)
 
         ad += '\n.. automodule:: ' + uri + '\n'
         ad += '\n.. currentmodule:: ' + uri + '\n'
         
         if classes:
             subhead = str(len(classes)) + (' Classes' if len(classes) > 1 else ' Class')
             ad += '\n'+ subhead + '\n' + \
                   self.rst_section_levels[2] * len(subhead) + '\n'
 
         for c in classes:
             ad += '\n.. autoclass:: ' + c.name + '\n'
             # must NOT exclude from index to keep cross-refs working
             ad += '  :members:\n' \
                   '  :show-inheritance:\n'
             if c.has_init:
                   ad += '\n  .. automethod:: __init__\n'
         
         if functions:
             subhead = str(len(functions)) + (' Functions' if len(functions) > 1 else ' Function')
             ad += '\n'+ subhead + '\n' + \
                   self.rst_section_levels[2] * len(subhead) + '\n'
         for f in functions:
             # must NOT exclude from index to keep cross-refs working
             ad += '\n.. autofunction:: ' + uri + '.' + f + '\n\n'
         return ad
 
     def _survives_exclude(self, matchstr, match_type):
         ''' Returns True if *matchstr* does not match patterns
 
         ``self.package_name`` removed from front of string if present
 
         Examples
         --------
         >>> dw = ApiDocWriter('sphinx')
         >>> dw._survives_exclude('sphinx.okpkg', 'package')
         True
         >>> dw.package_skip_patterns.append('^\\.badpkg$')
         >>> dw._survives_exclude('sphinx.badpkg', 'package')
         False
         >>> dw._survives_exclude('sphinx.badpkg', 'module')
         True
         >>> dw._survives_exclude('sphinx.badmod', 'module')
         True
         >>> dw.module_skip_patterns.append('^\\.badmod$')
         >>> dw._survives_exclude('sphinx.badmod', 'module')
         False
         '''
         if match_type == 'module':
             patterns = self.module_skip_patterns
         elif match_type == 'package':
             patterns = self.package_skip_patterns
         else:
             raise ValueError('Cannot interpret match type "%s"'
                              % match_type)
         # Match to URI without package name
         L = len(self.package_name)
         if matchstr[:L] == self.package_name:
             matchstr = matchstr[L:]
         for pat in patterns:
             try:
                 pat.search
             except AttributeError:
                 pat = re.compile(pat)
             if pat.search(matchstr):
                 return False
         return True
 
     def discover_modules(self):
         ''' Return module sequence discovered from ``self.package_name``
 
 
         Parameters
         ----------
         None
 
         Returns
         -------
         mods : sequence
             Sequence of module names within ``self.package_name``
 
         Examples
         --------
         >>> dw = ApiDocWriter('sphinx')
         >>> mods = dw.discover_modules()
         >>> 'sphinx.util' in mods
         True
-        >>> dw.package_skip_patterns.append('\.util$')
+        >>> dw.package_skip_patterns.append('\\.util$')
         >>> 'sphinx.util' in dw.discover_modules()
         False
         >>>
         '''
         modules = [self.package_name]
         # raw directory parsing
         for dirpath, dirnames, filenames in os.walk(self.root_path):
             # Check directory names for packages
             root_uri = self._path2uri(os.path.join(self.root_path,
                                                    dirpath))
             for dirname in dirnames[:]: # copy list - we modify inplace
                 package_uri = '.'.join((root_uri, dirname))
                 if (self._uri2path(package_uri) and
                     self._survives_exclude(package_uri, 'package')):
                     modules.append(package_uri)
                 else:
                     dirnames.remove(dirname)
             # Check filenames for modules
             for filename in filenames:
                 module_name = filename[:-3]
                 module_uri = '.'.join((root_uri, module_name))
                 if (self._uri2path(module_uri) and
                     self._survives_exclude(module_uri, 'module')):
                     modules.append(module_uri)
         return sorted(modules)
 
     def write_modules_api(self, modules,outdir):
         # write the list
         written_modules = []
         for m in modules:
             api_str = self.generate_api_doc(m)
             if not api_str:
                 continue
             # write out to file
             outfile = os.path.join(outdir,
                                    m + self.rst_extension)
             with open(outfile, 'wt') as fileobj:
                 fileobj.write(api_str)
             written_modules.append(m)
         self.written_modules = written_modules
 
     def write_api_docs(self, outdir):
         """Generate API reST files.
 
         Parameters
         ----------
         outdir : string
             Directory name in which to store files
             We create automatic filenames for each module
 
         Returns
         -------
         None
 
         Notes
         -----
         Sets self.written_modules to list of written modules
         """
         if not os.path.exists(outdir):
             os.mkdir(outdir)
         # compose list of modules
         modules = self.discover_modules()
         self.write_modules_api(modules,outdir)
 
     def write_index(self, outdir, path='gen.rst', relative_to=None):
         """Make a reST API index file from written files
 
         Parameters
         ----------
         outdir : string
             Directory to which to write generated index file
         path : string
             Filename to write index to
         relative_to : string
             path to which written filenames are relative.  This
             component of the written file path will be removed from
             outdir, in the generated index.  Default is None, meaning,
             leave path as it is.
         """
         if self.written_modules is None:
             raise ValueError('No modules written')
         # Get full filename path
         path = os.path.join(outdir, path)
         # Path written into index is relative to rootpath
         if relative_to is not None:
             relpath = outdir.replace(relative_to + os.path.sep, '')
         else:
             relpath = outdir
         with open(path,'wt') as idx:
             w = idx.write
             w('.. AUTO-GENERATED FILE -- DO NOT EDIT!\n\n')
             w('.. autosummary::\n'
             '   :toctree: %s\n\n' % relpath)
             for mod in self.written_modules:
                 w('   %s\n' % mod)

setupbase.py

@@ -1,403 +1,403 b''
 # encoding: utf-8
 """
 This module defines the things that are used in setup.py for building IPython
 
 This includes:
 
     * The basic arguments to setup
     * Functions for finding things like packages, package data, etc.
     * A function for checking dependencies.
 """
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 
 import re
 import os
 import sys
 
 from distutils import log
 from distutils.command.build_py import build_py
 from distutils.command.build_scripts import build_scripts
 from distutils.command.install import install
 from distutils.command.install_scripts import install_scripts
 from distutils.cmd import Command
 from glob import glob
 
 from setupext import install_data_ext
 
 #-------------------------------------------------------------------------------
 # Useful globals and utility functions
 #-------------------------------------------------------------------------------
 
 # A few handy globals
 isfile = os.path.isfile
 pjoin = os.path.join
 repo_root = os.path.dirname(os.path.abspath(__file__))
 
 def execfile(fname, globs, locs=None):
     locs = locs or globs
     exec(compile(open(fname).read(), fname, "exec"), globs, locs)
 
 # A little utility we'll need below, since glob() does NOT allow you to do
 # exclusion on multiple endings!
 def file_doesnt_endwith(test,endings):
     """Return true if test is a file and its name does NOT end with any
     of the strings listed in endings."""
     if not isfile(test):
         return False
     for e in endings:
         if test.endswith(e):
             return False
     return True
 
 #---------------------------------------------------------------------------
 # Basic project information
 #---------------------------------------------------------------------------
 
 # release.py contains version, authors, license, url, keywords, etc.
 execfile(pjoin(repo_root, 'IPython','core','release.py'), globals())
 
 # Create a dict with the basic information
 # This dict is eventually passed to setup after additional keys are added.
 setup_args = dict(
       name             = name,
       version          = version,
       description      = description,
       long_description = long_description,
       author           = author,
       author_email     = author_email,
       url              = url,
       license          = license,
       platforms        = platforms,
       keywords         = keywords,
       classifiers      = classifiers,
       cmdclass         = {'install_data': install_data_ext},
       project_urls={
           'Documentation': 'https://ipython.readthedocs.io/',
           'Funding'      : 'https://numfocus.org/',
           'Source'       : 'https://github.com/ipython/ipython',
           'Tracker'      : 'https://github.com/ipython/ipython/issues',
       }
       )
 
 
 #---------------------------------------------------------------------------
 # Find packages
 #---------------------------------------------------------------------------
 
 def find_packages():
     """
     Find all of IPython's packages.
     """
     excludes = ['deathrow', 'quarantine']
     packages = []
     for dir,subdirs,files in os.walk('IPython'):
         package = dir.replace(os.path.sep, '.')
         if any(package.startswith('IPython.'+exc) for exc in excludes):
             # package is to be excluded (e.g. deathrow)
             continue
         if '__init__.py' not in files:
             # not a package
             continue
         packages.append(package)
     return packages
 
 #---------------------------------------------------------------------------
 # Find package data
 #---------------------------------------------------------------------------
 
 def find_package_data():
     """
     Find IPython's package_data.
     """
     # This is not enough for these things to appear in an sdist.
     # We need to muck with the MANIFEST to get this to work
     
     package_data = {
         'IPython.core' : ['profile/README*'],
         'IPython.core.tests' : ['*.png', '*.jpg', 'daft_extension/*.py'],
         'IPython.lib.tests' : ['*.wav'],
         'IPython.testing.plugin' : ['*.txt'],
     }
     
     return package_data
 
 
 def check_package_data(package_data):
     """verify that package_data globs make sense"""
     print("checking package data")
     for pkg, data in package_data.items():
         pkg_root = pjoin(*pkg.split('.'))
         for d in data:
             path = pjoin(pkg_root, d)
             if '*' in path:
                 assert len(glob(path)) > 0, "No files match pattern %s" % path
             else:
                 assert os.path.exists(path), "Missing package data: %s" % path
 
 
 def check_package_data_first(command):
     """decorator for checking package_data before running a given command
     
     Probably only needs to wrap build_py
     """
     class DecoratedCommand(command):
         def run(self):
             check_package_data(self.package_data)
             command.run(self)
     return DecoratedCommand
 
 
 #---------------------------------------------------------------------------
 # Find data files
 #---------------------------------------------------------------------------
 
 def find_data_files():
     """
     Find IPython's data_files.
 
     Just man pages at this point.
     """
 
     manpagebase = pjoin('share', 'man', 'man1')
 
     # Simple file lists can be made by hand
     manpages = [f for f in glob(pjoin('docs','man','*.1.gz')) if isfile(f)]
     if not manpages:
         # When running from a source tree, the manpages aren't gzipped
         manpages = [f for f in glob(pjoin('docs','man','*.1')) if isfile(f)]
 
     # And assemble the entire output list
     data_files = [ (manpagebase, manpages) ]
 
     return data_files
 
 
 # The two functions below are copied from IPython.utils.path, so we don't need
 # to import IPython during setup, which fails on Python 3.
 
 def target_outdated(target,deps):
     """Determine whether a target is out of date.
 
     target_outdated(target,deps) -> 1/0
 
     deps: list of filenames which MUST exist.
     target: single filename which may or may not exist.
 
     If target doesn't exist or is older than any file listed in deps, return
     true, otherwise return false.
     """
     try:
         target_time = os.path.getmtime(target)
     except os.error:
         return 1
     for dep in deps:
         dep_time = os.path.getmtime(dep)
         if dep_time > target_time:
             #print "For target",target,"Dep failed:",dep # dbg
             #print "times (dep,tar):",dep_time,target_time # dbg
             return 1
     return 0
 
 
 def target_update(target,deps,cmd):
     """Update a target with a given command given a list of dependencies.
 
     target_update(target,deps,cmd) -> runs cmd if target is outdated.
 
     This is just a wrapper around target_outdated() which calls the given
     command if target is outdated."""
 
     if target_outdated(target,deps):
         os.system(cmd)
 
 #---------------------------------------------------------------------------
 # Find scripts
 #---------------------------------------------------------------------------
 
 def find_entry_points():
     """Defines the command line entry points for IPython
 
     This always uses setuptools-style entry points. When setuptools is not in
     use, our own build_scripts_entrypt class below parses these and builds
     command line scripts.
 
     Each of our entry points gets both a plain name, e.g. ipython, and one
     suffixed with the Python major version number, e.g. ipython3. 
     """
     ep = [
             'ipython%s = IPython:start_ipython',
             'iptest%s = IPython.testing.iptestcontroller:main',
         ]
     suffix = str(sys.version_info[0])
     return [e % '' for e in ep] + [e % suffix for e in ep]
 
 script_src = """#!{executable}
 # This script was automatically generated by setup.py
 if __name__ == '__main__':
     from {mod} import {func}
     {func}()
 """
 
 class build_scripts_entrypt(build_scripts):
     """Build the command line scripts
     
     Parse setuptools style entry points and write simple scripts to run the
     target functions.
     
     On Windows, this also creates .cmd wrappers for the scripts so that you can
     easily launch them from a command line.
     """
     def run(self):
         self.mkpath(self.build_dir)
         outfiles = []
         for script in find_entry_points():
             name, entrypt = script.split('=')
             name = name.strip()
             entrypt = entrypt.strip()
             outfile = os.path.join(self.build_dir, name)
             outfiles.append(outfile)
             print('Writing script to', outfile)
 
             mod, func = entrypt.split(':')
             with open(outfile, 'w') as f:
                 f.write(script_src.format(executable=sys.executable,
                                           mod=mod, func=func))
             
             if sys.platform == 'win32':
                 # Write .cmd wrappers for Windows so 'ipython' etc. work at the
                 # command line
                 cmd_file = os.path.join(self.build_dir, name + '.cmd')
-                cmd = '@"{python}" "%~dp0\{script}" %*\r\n'.format(
+                cmd = r'@"{python}" "%~dp0\{script}" %*\r\n'.format(
                         python=sys.executable, script=name)
                 log.info("Writing %s wrapper script" % cmd_file)
                 with open(cmd_file, 'w') as f:
                     f.write(cmd)
 
         return outfiles, outfiles
 
 class install_lib_symlink(Command):
     user_options = [
         ('install-dir=', 'd', "directory to install to"),
         ]
 
     def initialize_options(self):
         self.install_dir = None
 
     def finalize_options(self):
         self.set_undefined_options('symlink',
                                    ('install_lib', 'install_dir'),
                                   )
 
     def run(self):
         if sys.platform == 'win32':
             raise Exception("This doesn't work on Windows.")
         pkg = os.path.join(os.getcwd(), 'IPython')
         dest = os.path.join(self.install_dir, 'IPython')
         if os.path.islink(dest):
             print('removing existing symlink at %s' % dest)
             os.unlink(dest)
         print('symlinking %s -> %s' % (pkg, dest))
         os.symlink(pkg, dest)
 
 class unsymlink(install):
     def run(self):
         dest = os.path.join(self.install_lib, 'IPython')
         if os.path.islink(dest):
             print('removing symlink at %s' % dest)
             os.unlink(dest)
         else:
             print('No symlink exists at %s' % dest)
 
 class install_symlinked(install):
     def run(self):
         if sys.platform == 'win32':
             raise Exception("This doesn't work on Windows.")
 
         # Run all sub-commands (at least those that need to be run)
         for cmd_name in self.get_sub_commands():
             self.run_command(cmd_name)
     
     # 'sub_commands': a list of commands this command might have to run to
     # get its work done.  See cmd.py for more info.
     sub_commands = [('install_lib_symlink', lambda self:True),
                     ('install_scripts_sym', lambda self:True),
                    ]
 
 class install_scripts_for_symlink(install_scripts):
     """Redefined to get options from 'symlink' instead of 'install'.
     
     I love distutils almost as much as I love setuptools.
     """
     def finalize_options(self):
         self.set_undefined_options('build', ('build_scripts', 'build_dir'))
         self.set_undefined_options('symlink',
                                    ('install_scripts', 'install_dir'),
                                    ('force', 'force'),
                                    ('skip_build', 'skip_build'),
                                   )
 
 
 #---------------------------------------------------------------------------
 # VCS related
 #---------------------------------------------------------------------------
 
 
 def git_prebuild(pkg_dir, build_cmd=build_py):
     """Return extended build or sdist command class for recording commit
     
     records git commit in IPython.utils._sysinfo.commit
     
     for use in IPython.utils.sysinfo.sys_info() calls after installation.
     """
     
     class MyBuildPy(build_cmd):
         ''' Subclass to write commit data into installation tree '''
         def run(self):
             # loose as `.dev` is suppose to be invalid
             print("check version number")
-            loose_pep440re = re.compile('^(\d+)\.(\d+)\.(\d+((a|b|rc)\d+)?)(\.post\d+)?(\.dev\d*)?$')
+            loose_pep440re = re.compile(r'^(\d+)\.(\d+)\.(\d+((a|b|rc)\d+)?)(\.post\d+)?(\.dev\d*)?$')
             if not loose_pep440re.match(version):
                 raise ValueError("Version number '%s' is not valid (should match [N!]N(.N)*[{a|b|rc}N][.postN][.devN])" % version)
 
 
             build_cmd.run(self)
             # this one will only fire for build commands
             if hasattr(self, 'build_lib'):
                 self._record_commit(self.build_lib)
         
         def make_release_tree(self, base_dir, files):
             # this one will fire for sdist
             build_cmd.make_release_tree(self, base_dir, files)
             self._record_commit(base_dir)
         
         def _record_commit(self, base_dir):
             import subprocess
             proc = subprocess.Popen('git rev-parse --short HEAD',
                                     stdout=subprocess.PIPE,
                                     stderr=subprocess.PIPE,
                                     shell=True)
             repo_commit, _ = proc.communicate()
             repo_commit = repo_commit.strip().decode("ascii")
             
             out_pth = pjoin(base_dir, pkg_dir, 'utils', '_sysinfo.py')
             if os.path.isfile(out_pth) and not repo_commit:
                 # nothing to write, don't clobber
                 return
             
             print("writing git commit '%s' to %s" % (repo_commit, out_pth))
             
             # remove to avoid overwriting original via hard link
             try:
                 os.remove(out_pth)
             except (IOError, OSError):
                 pass
             with open(out_pth, 'w') as out_file:
                 out_file.writelines([
                     '# GENERATED BY setup.py\n',
                     'commit = u"%s"\n' % repo_commit,
                 ])
     return MyBuildPy