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ipython_directive.py
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# -*- coding: utf-8 -*-
"""Sphinx directive to support embedded IPython 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.
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).
By default this directive assumes that your prompts are unchanged IPython ones,
but this can be customized. For example, the following code in your Sphinx
config file will configure this directive for the following input/output
prompts ``Yade [1]:`` and ``-> [1]:``::
import ipython_directive as id
id.rgxin =re.compile(r'(?:In |Yade )\[(\d+)\]:\s?(.*)\s*')
id.rgxout=re.compile(r'(?:Out| -> )\[(\d+)\]:\s?(.*)\s*')
id.fmtin ='Yade [%d]:'
id.fmtout=' -> [%d]:'
from IPython import Config
id.CONFIG = Config(
prompt_in1="Yade [\#]:",
prompt_in2=" .\D..",
prompt_out=" -> [\#]:"
)
id.reconfig_shell()
import ipython_console_highlighting as ich
ich.IPythonConsoleLexer.input_prompt=
re.compile("(Yade \[[0-9]+\]: )|( \.\.\.+:)")
ich.IPythonConsoleLexer.output_prompt=
re.compile("(( -> )|(Out)\[[0-9]+\]: )|( \.\.\.+:)")
ich.IPythonConsoleLexer.continue_prompt=re.compile(" \.\.\.+:")
ToDo
----
- Turn the ad-hoc test() function into a real test suite.
- Break up ipython-specific functionality from matplotlib stuff into better
separated code.
- Make sure %bookmarks used internally are removed on exit.
Authors
-------
- John D Hunter: orignal author.
- Fernando Perez: refactoring, documentation, cleanups, port to 0.11.
- VáclavŠmilauer <eudoxos-AT-arcig.cz>: Prompt generalizations.
"""
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Stdlib
import cStringIO
import os
import re
import sys
# To keep compatibility with various python versions
try:
from hashlib import md5
except ImportError:
from md5 import md5
# Third-party
import matplotlib
import sphinx
from docutils.parsers.rst import directives
matplotlib.use('Agg')
# Our own
from IPython import Config, InteractiveShell
from IPython.utils.io import Term
#-----------------------------------------------------------------------------
# Globals
#-----------------------------------------------------------------------------
sphinx_version = sphinx.__version__.split(".")
# The split is necessary for sphinx beta versions where the string is
# '6b1'
sphinx_version = tuple([int(re.split('[a-z]', x)[0])
for x in sphinx_version[:2]])
COMMENT, INPUT, OUTPUT = range(3)
CONFIG = Config()
rgxin = re.compile('In \[(\d+)\]:\s?(.*)\s*')
rgxout = re.compile('Out\[(\d+)\]:\s?(.*)\s*')
fmtin = 'In [%d]:'
fmtout = 'Out[%d]:'
#-----------------------------------------------------------------------------
# Functions and class declarations
#-----------------------------------------------------------------------------
def block_parser(part):
"""
part is a string of ipython text, comprised of at most one
input, one ouput, 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('@'):
# we're assuming at most one decorator -- may need to
# rethink
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):
inputline += '\n' + nextline[Nc:]
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):
self.cout = cStringIO.StringIO()
Term.cout = self.cout
Term.cerr = self.cout
# For debugging, so we can see normal output, use this:
# from IPython.utils.io import Tee
#Term.cout = Tee(self.cout, channel='stdout') # dbg
#Term.cerr = Tee(self.cout, channel='stderr') # dbg
# Create config object for IPython
config = Config()
config.Global.display_banner = False
config.Global.exec_lines = ['import numpy as np',
'from pylab import *'
]
config.InteractiveShell.autocall = False
config.InteractiveShell.autoindent = False
config.InteractiveShell.colors = 'NoColor'
# Create and initialize ipython, but don't start its mainloop
IP = InteractiveShell.instance(config=config)
# 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.is_verbatim = False
self.is_doctest = False
self.is_suppress = False
# 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
# we need bookmark the current dir first so we can save
# relative to it
self.process_input_line('bookmark ipy_basedir')
self.cout.seek(0)
self.cout.truncate(0)
def process_input_line(self, line):
"""process the input, capturing stdout"""
#print "input='%s'"%self.input
stdout = sys.stdout
try:
sys.stdout = self.cout
self.IP.push_line(line)
finally:
sys.stdout = stdout
# 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
#print 'INPUT:', data # dbg
is_verbatim = decorator=='@verbatim' or self.is_verbatim
is_doctest = decorator=='@doctest' or self.is_doctest
is_suppress = decorator=='@suppress' or self.is_suppress
is_savefig = decorator is not None and \
decorator.startswith('@savefig')
input_lines = input.split('\n')
continuation = ' %s:'%''.join(['.']*(len(str(lineno))+2))
Nc = len(continuation)
if is_savefig:
saveargs = decorator.split(' ')
filename = saveargs[1]
outfile = os.path.join('_static/%s'%filename)
# build out an image directive like
# .. image:: somefile.png
# :width 4in
#
# from an input like
# savefig somefile.png width=4in
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 = outfile
image_directive = '\n'.join(imagerows)
# TODO: can we get "rest" from ipython
#self.process_input_line('\n'.join(input_lines))
ret = []
is_semicolon = False
for i, line in enumerate(input_lines):
if line.endswith(';'):
is_semicolon = True
if i==0:
# process the first input line
if is_verbatim:
self.process_input_line('')
else:
# only submit the line in non-verbatim mode
self.process_input_line(line)
formatted_line = '%s %s'%(input_prompt, line)
else:
# process a continuation line
if not is_verbatim:
self.process_input_line(line)
formatted_line = '%s %s'%(continuation, line)
if not is_suppress:
ret.append(formatted_line)
if not is_suppress:
if len(rest.strip()):
if is_verbatim:
# the "rest" is the standard output of the
# input, which needs to be added in
# verbatim mode
ret.append(rest)
self.cout.seek(0)
output = self.cout.read()
if not is_suppress and not is_semicolon:
ret.append(output)
self.cout.truncate(0)
return ret, input_lines, output, is_doctest, image_file
#print 'OUTPUT', output # dbg
def process_output(self, data, output_prompt,
input_lines, output, is_doctest, image_file):
"""Process data block for OUTPUT token."""
if is_doctest:
submitted = data.strip()
found = output
if found is not None:
found = found.strip()
# XXX - fperez: in 0.11, 'output' never comes with the prompt
# in it, just the actual output text. So I think all this code
# can be nuked...
## ind = found.find(output_prompt)
## if ind<0:
## e='output prompt="%s" does not match out line=%s' % \
## (output_prompt, found)
## raise RuntimeError(e)
## found = found[len(output_prompt):].strip()
if found!=submitted:
e = ('doctest failure for input_lines="%s" with '
'found_output="%s" and submitted output="%s"' %
(input_lines, found, submitted) )
raise RuntimeError(e)
#print 'doctest PASSED for input_lines="%s" with found_output="%s" and submitted output="%s"'%(input_lines, found, submitted)
def process_comment(self, data):
"""Process data block for COMMENT token."""
if not self.is_suppress:
return [data]
def process_block(self, block):
"""
process block from the block_parser and return a list of processed lines
"""
ret = []
output = None
input_lines = None
m = rgxin.match(str(self.IP.outputcache.prompt1).strip())
lineno = int(m.group(1))
input_prompt = fmtin%lineno
output_prompt = fmtout%lineno
image_file = None
image_directive = None
# XXX - This needs a second refactor. There's too much state being
# held globally, which makes for a very awkward interface and large,
# hard to test functions. I've already broken this up at least into
# three separate processors to isolate the logic better, but this only
# serves to highlight the coupling. Next we need to clean it up...
for token, data in block:
if token==COMMENT:
out_data = self.process_comment(data)
elif token==INPUT:
out_data, input_lines, output, is_doctest, image_file= \
self.process_input(data, input_prompt, lineno)
elif token==OUTPUT:
out_data = \
self.process_output(data, output_prompt,
input_lines, output, is_doctest,
image_file)
if out_data:
ret.extend(out_data)
if image_file is not None:
self.ensure_pyplot()
command = 'plt.gcf().savefig("%s")'%image_file
print 'SAVEFIG', command # dbg
self.process_input_line('bookmark ipy_thisdir')
self.process_input_line('cd -b ipy_basedir')
self.process_input_line(command)
self.process_input_line('cd -b ipy_thisdir')
self.cout.seek(0)
self.cout.truncate(0)
return ret, image_directive
def ensure_pyplot(self):
if self._pyplot_imported:
return
self.process_input_line('import matplotlib.pyplot as plt')
# A global instance used below. XXX: not sure why this can't be created inside
# ipython_directive itself.
shell = EmbeddedSphinxShell()
def reconfig_shell():
"""Called after setting module-level variables to re-instantiate
with the set values (since shell is instantiated first at import-time
when module variables have default values)"""
global shell
shell = EmbeddedSphinxShell()
def ipython_directive(name, arguments, options, content, lineno,
content_offset, block_text, state, state_machine,
):
debug = ipython_directive.DEBUG
shell.is_suppress = options.has_key('suppress')
shell.is_doctest = options.has_key('doctest')
shell.is_verbatim = options.has_key('verbatim')
#print 'ipy', shell.is_suppress, options
parts = '\n'.join(content).split('\n\n')
lines = ['.. sourcecode:: ipython', '']
figures = []
for part in parts:
block = block_parser(part)
if len(block):
rows, figure = shell.process_block(block)
for row in rows:
lines.extend([' %s'%line for line in row.split('\n')])
if figure is not None:
figures.append(figure)
for figure in figures:
lines.append('')
lines.extend(figure.split('\n'))
lines.append('')
#print lines
if len(lines)>2:
if debug:
print '\n'.join(lines)
else:
#print 'INSERTING %d lines'%len(lines)
state_machine.insert_input(
lines, state_machine.input_lines.source(0))
return []
ipython_directive.DEBUG = False
ipython_directive.DEBUG = True # dbg
# Enable as a proper Sphinx directive
def setup(app):
setup.app = app
options = {'suppress': directives.flag,
'doctest': directives.flag,
'verbatim': directives.flag,
}
app.add_directive('ipython', ipython_directive, True, (0, 2, 0), **options)
# 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]: np.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)
""",
]
#ipython_directive.DEBUG = True # dbg
#options = dict(suppress=True) # dbg
options = dict()
for example in examples:
content = example.split('\n')
ipython_directive('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/'