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"""A ZMQ-based subclass of InteractiveShell.
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This code is meant to ease the refactoring of the base InteractiveShell into
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something with a cleaner architecture for 2-process use, without actually
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breaking InteractiveShell itself. So we're doing something a bit ugly, where
|
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we subclass and override what we want to fix. Once this is working well, we
|
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can go back to the base class and refactor the code for a cleaner inheritance
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implementation that doesn't rely on so much monkeypatching.
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But this lets us maintain a fully working IPython as we develop the new
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|
machinery. This should thus be thought of as scaffolding.
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"""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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# Stdlib
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import inspect
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import os
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import re
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# Our own
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from IPython.core.interactiveshell import (
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InteractiveShell, InteractiveShellABC
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)
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from IPython.core import page
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from IPython.core.displayhook import DisplayHook
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from IPython.core.macro import Macro
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from IPython.core.payloadpage import install_payload_page
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from IPython.utils import io
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from IPython.utils.path import get_py_filename
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from IPython.utils.text import StringTypes
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from IPython.utils.traitlets import Instance, Type, Dict
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from IPython.utils.warn import warn
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from IPython.zmq.session import extract_header
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from session import Session
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#-----------------------------------------------------------------------------
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# Globals and side-effects
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#-----------------------------------------------------------------------------
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# Install the payload version of page.
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install_payload_page()
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#-----------------------------------------------------------------------------
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# Functions and classes
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#-----------------------------------------------------------------------------
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class ZMQDisplayHook(DisplayHook):
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session = Instance(Session)
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pub_socket = Instance('zmq.Socket')
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parent_header = Dict({})
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def set_parent(self, parent):
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"""Set the parent for outbound messages."""
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self.parent_header = extract_header(parent)
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def start_displayhook(self):
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self.msg = self.session.msg(u'pyout', {}, parent=self.parent_header)
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def write_output_prompt(self):
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"""Write the output prompt."""
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if self.do_full_cache:
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self.msg['content']['execution_count'] = self.prompt_count
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def write_result_repr(self, result_repr):
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self.msg['content']['data'] = result_repr
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def finish_displayhook(self):
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"""Finish up all displayhook activities."""
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self.pub_socket.send_json(self.msg)
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self.msg = None
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class ZMQInteractiveShell(InteractiveShell):
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"""A subclass of InteractiveShell for ZMQ."""
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displayhook_class = Type(ZMQDisplayHook)
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keepkernel_on_exit = None
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def init_environment(self):
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"""Configure the user's environment.
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"""
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env = os.environ
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# These two ensure 'ls' produces nice coloring on BSD-derived systems
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env['TERM'] = 'xterm-color'
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env['CLICOLOR'] = '1'
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# Since normal pagers don't work at all (over pexpect we don't have
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# single-key control of the subprocess), try to disable paging in
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# subprocesses as much as possible.
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env['PAGER'] = 'cat'
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env['GIT_PAGER'] = 'cat'
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def auto_rewrite_input(self, cmd):
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"""Called to show the auto-rewritten input for autocall and friends.
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FIXME: this payload is currently not correctly processed by the
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frontend.
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"""
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new = self.displayhook.prompt1.auto_rewrite() + cmd
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payload = dict(
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source='IPython.zmq.zmqshell.ZMQInteractiveShell.auto_rewrite_input',
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transformed_input=new,
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)
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self.payload_manager.write_payload(payload)
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def ask_exit(self):
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"""Engage the exit actions."""
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payload = dict(
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source='IPython.zmq.zmqshell.ZMQInteractiveShell.ask_exit',
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exit=True,
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keepkernel=self.keepkernel_on_exit,
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)
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self.payload_manager.write_payload(payload)
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def _showtraceback(self, etype, evalue, stb):
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exc_content = {
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u'traceback' : stb,
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u'ename' : unicode(etype.__name__),
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u'evalue' : unicode(evalue)
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}
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dh = self.displayhook
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exc_msg = dh.session.msg(u'pyerr', exc_content, dh.parent_header)
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# Send exception info over pub socket for other clients than the caller
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# to pick up
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dh.pub_socket.send_json(exc_msg)
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# FIXME - Hack: store exception info in shell object. Right now, the
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# caller is reading this info after the fact, we need to fix this logic
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# to remove this hack. Even uglier, we need to store the error status
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# here, because in the main loop, the logic that sets it is being
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# skipped because runlines swallows the exceptions.
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exc_content[u'status'] = u'error'
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self._reply_content = exc_content
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# /FIXME
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return exc_content
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#------------------------------------------------------------------------
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# Magic overrides
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#------------------------------------------------------------------------
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# Once the base class stops inheriting from magic, this code needs to be
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# moved into a separate machinery as well. For now, at least isolate here
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# the magics which this class needs to implement differently from the base
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# class, or that are unique to it.
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def magic_doctest_mode(self,parameter_s=''):
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"""Toggle doctest mode on and off.
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This mode is intended to make IPython behave as much as possible like a
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plain Python shell, from the perspective of how its prompts, exceptions
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and output look. This makes it easy to copy and paste parts of a
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|
|
session into doctests. It does so by:
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- Changing the prompts to the classic ``>>>`` ones.
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- Changing the exception reporting mode to 'Plain'.
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|
- Disabling pretty-printing of output.
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|
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|
Note that IPython also supports the pasting of code snippets that have
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|
leading '>>>' and '...' prompts in them. This means that you can paste
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doctests from files or docstrings (even if they have leading
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|
|
whitespace), and the code will execute correctly. You can then use
|
|
|
'%history -t' to see the translated history; this will give you the
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|
|
input after removal of all the leading prompts and whitespace, which
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|
|
can be pasted back into an editor.
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|
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|
With these features, you can switch into this mode easily whenever you
|
|
|
need to do testing and changes to doctests, without having to leave
|
|
|
your existing IPython session.
|
|
|
"""
|
|
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|
|
|
from IPython.utils.ipstruct import Struct
|
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|
|
|
# Shorthands
|
|
|
shell = self.shell
|
|
|
# dstore is a data store kept in the instance metadata bag to track any
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|
|
# changes we make, so we can undo them later.
|
|
|
dstore = shell.meta.setdefault('doctest_mode', Struct())
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|
|
save_dstore = dstore.setdefault
|
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|
|
|
# save a few values we'll need to recover later
|
|
|
mode = save_dstore('mode', False)
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|
|
save_dstore('rc_pprint', shell.pprint)
|
|
|
save_dstore('xmode', shell.InteractiveTB.mode)
|
|
|
|
|
|
if mode == False:
|
|
|
# turn on
|
|
|
shell.pprint = False
|
|
|
shell.magic_xmode('Plain')
|
|
|
else:
|
|
|
# turn off
|
|
|
shell.pprint = dstore.rc_pprint
|
|
|
shell.magic_xmode(dstore.xmode)
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|
|
|
|
|
# Store new mode and inform on console
|
|
|
dstore.mode = bool(1-int(mode))
|
|
|
mode_label = ['OFF','ON'][dstore.mode]
|
|
|
print('Doctest mode is:', mode_label)
|
|
|
|
|
|
# Send the payload back so that clients can modify their prompt display
|
|
|
payload = dict(
|
|
|
source='IPython.zmq.zmqshell.ZMQInteractiveShell.magic_doctest_mode',
|
|
|
mode=dstore.mode)
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def magic_edit(self,parameter_s='',last_call=['','']):
|
|
|
"""Bring up an editor and execute the resulting code.
|
|
|
|
|
|
Usage:
|
|
|
%edit [options] [args]
|
|
|
|
|
|
%edit runs IPython's editor hook. The default version of this hook is
|
|
|
set to call the __IPYTHON__.rc.editor command. This is read from your
|
|
|
environment variable $EDITOR. If this isn't found, it will default to
|
|
|
vi under Linux/Unix and to notepad under Windows. See the end of this
|
|
|
docstring for how to change the editor hook.
|
|
|
|
|
|
You can also set the value of this editor via the command line option
|
|
|
'-editor' or in your ipythonrc file. This is useful if you wish to use
|
|
|
specifically for IPython an editor different from your typical default
|
|
|
(and for Windows users who typically don't set environment variables).
|
|
|
|
|
|
This command allows you to conveniently edit multi-line code right in
|
|
|
your IPython session.
|
|
|
|
|
|
If called without arguments, %edit opens up an empty editor with a
|
|
|
temporary file and will execute the contents of this file when you
|
|
|
close it (don't forget to save it!).
|
|
|
|
|
|
|
|
|
Options:
|
|
|
|
|
|
-n <number>: open the editor at a specified line number. By default,
|
|
|
the IPython editor hook uses the unix syntax 'editor +N filename', but
|
|
|
you can configure this by providing your own modified hook if your
|
|
|
favorite editor supports line-number specifications with a different
|
|
|
syntax.
|
|
|
|
|
|
-p: this will call the editor with the same data as the previous time
|
|
|
it was used, regardless of how long ago (in your current session) it
|
|
|
was.
|
|
|
|
|
|
-r: use 'raw' input. This option only applies to input taken from the
|
|
|
user's history. By default, the 'processed' history is used, so that
|
|
|
magics are loaded in their transformed version to valid Python. If
|
|
|
this option is given, the raw input as typed as the command line is
|
|
|
used instead. When you exit the editor, it will be executed by
|
|
|
IPython's own processor.
|
|
|
|
|
|
-x: do not execute the edited code immediately upon exit. This is
|
|
|
mainly useful if you are editing programs which need to be called with
|
|
|
command line arguments, which you can then do using %run.
|
|
|
|
|
|
|
|
|
Arguments:
|
|
|
|
|
|
If arguments are given, the following possibilites exist:
|
|
|
|
|
|
- The arguments are numbers or pairs of colon-separated numbers (like
|
|
|
1 4:8 9). These are interpreted as lines of previous input to be
|
|
|
loaded into the editor. The syntax is the same of the %macro command.
|
|
|
|
|
|
- If the argument doesn't start with a number, it is evaluated as a
|
|
|
variable and its contents loaded into the editor. You can thus edit
|
|
|
any string which contains python code (including the result of
|
|
|
previous edits).
|
|
|
|
|
|
- If the argument is the name of an object (other than a string),
|
|
|
IPython will try to locate the file where it was defined and open the
|
|
|
editor at the point where it is defined. You can use `%edit function`
|
|
|
to load an editor exactly at the point where 'function' is defined,
|
|
|
edit it and have the file be executed automatically.
|
|
|
|
|
|
If the object is a macro (see %macro for details), this opens up your
|
|
|
specified editor with a temporary file containing the macro's data.
|
|
|
Upon exit, the macro is reloaded with the contents of the file.
|
|
|
|
|
|
Note: opening at an exact line is only supported under Unix, and some
|
|
|
editors (like kedit and gedit up to Gnome 2.8) do not understand the
|
|
|
'+NUMBER' parameter necessary for this feature. Good editors like
|
|
|
(X)Emacs, vi, jed, pico and joe all do.
|
|
|
|
|
|
- If the argument is not found as a variable, IPython will look for a
|
|
|
file with that name (adding .py if necessary) and load it into the
|
|
|
editor. It will execute its contents with execfile() when you exit,
|
|
|
loading any code in the file into your interactive namespace.
|
|
|
|
|
|
After executing your code, %edit will return as output the code you
|
|
|
typed in the editor (except when it was an existing file). This way
|
|
|
you can reload the code in further invocations of %edit as a variable,
|
|
|
via _<NUMBER> or Out[<NUMBER>], where <NUMBER> is the prompt number of
|
|
|
the output.
|
|
|
|
|
|
Note that %edit is also available through the alias %ed.
|
|
|
|
|
|
This is an example of creating a simple function inside the editor and
|
|
|
then modifying it. First, start up the editor:
|
|
|
|
|
|
In [1]: ed
|
|
|
Editing... done. Executing edited code...
|
|
|
Out[1]: 'def foo():n print "foo() was defined in an editing session"n'
|
|
|
|
|
|
We can then call the function foo():
|
|
|
|
|
|
In [2]: foo()
|
|
|
foo() was defined in an editing session
|
|
|
|
|
|
Now we edit foo. IPython automatically loads the editor with the
|
|
|
(temporary) file where foo() was previously defined:
|
|
|
|
|
|
In [3]: ed foo
|
|
|
Editing... done. Executing edited code...
|
|
|
|
|
|
And if we call foo() again we get the modified version:
|
|
|
|
|
|
In [4]: foo()
|
|
|
foo() has now been changed!
|
|
|
|
|
|
Here is an example of how to edit a code snippet successive
|
|
|
times. First we call the editor:
|
|
|
|
|
|
In [5]: ed
|
|
|
Editing... done. Executing edited code...
|
|
|
hello
|
|
|
Out[5]: "print 'hello'n"
|
|
|
|
|
|
Now we call it again with the previous output (stored in _):
|
|
|
|
|
|
In [6]: ed _
|
|
|
Editing... done. Executing edited code...
|
|
|
hello world
|
|
|
Out[6]: "print 'hello world'n"
|
|
|
|
|
|
Now we call it with the output #8 (stored in _8, also as Out[8]):
|
|
|
|
|
|
In [7]: ed _8
|
|
|
Editing... done. Executing edited code...
|
|
|
hello again
|
|
|
Out[7]: "print 'hello again'n"
|
|
|
|
|
|
|
|
|
Changing the default editor hook:
|
|
|
|
|
|
If you wish to write your own editor hook, you can put it in a
|
|
|
configuration file which you load at startup time. The default hook
|
|
|
is defined in the IPython.core.hooks module, and you can use that as a
|
|
|
starting example for further modifications. That file also has
|
|
|
general instructions on how to set a new hook for use once you've
|
|
|
defined it."""
|
|
|
|
|
|
# FIXME: This function has become a convoluted mess. It needs a
|
|
|
# ground-up rewrite with clean, simple logic.
|
|
|
|
|
|
def make_filename(arg):
|
|
|
"Make a filename from the given args"
|
|
|
try:
|
|
|
filename = get_py_filename(arg)
|
|
|
except IOError:
|
|
|
if args.endswith('.py'):
|
|
|
filename = arg
|
|
|
else:
|
|
|
filename = None
|
|
|
return filename
|
|
|
|
|
|
# custom exceptions
|
|
|
class DataIsObject(Exception): pass
|
|
|
|
|
|
opts,args = self.parse_options(parameter_s,'prn:')
|
|
|
# Set a few locals from the options for convenience:
|
|
|
opts_p = opts.has_key('p')
|
|
|
opts_r = opts.has_key('r')
|
|
|
|
|
|
# Default line number value
|
|
|
lineno = opts.get('n',None)
|
|
|
if lineno is not None:
|
|
|
try:
|
|
|
lineno = int(lineno)
|
|
|
except:
|
|
|
warn("The -n argument must be an integer.")
|
|
|
return
|
|
|
|
|
|
if opts_p:
|
|
|
args = '_%s' % last_call[0]
|
|
|
if not self.shell.user_ns.has_key(args):
|
|
|
args = last_call[1]
|
|
|
|
|
|
# use last_call to remember the state of the previous call, but don't
|
|
|
# let it be clobbered by successive '-p' calls.
|
|
|
try:
|
|
|
last_call[0] = self.shell.displayhook.prompt_count
|
|
|
if not opts_p:
|
|
|
last_call[1] = parameter_s
|
|
|
except:
|
|
|
pass
|
|
|
|
|
|
# by default this is done with temp files, except when the given
|
|
|
# arg is a filename
|
|
|
use_temp = 1
|
|
|
|
|
|
if re.match(r'\d',args):
|
|
|
# Mode where user specifies ranges of lines, like in %macro.
|
|
|
# This means that you can't edit files whose names begin with
|
|
|
# numbers this way. Tough.
|
|
|
ranges = args.split()
|
|
|
data = ''.join(self.extract_input_slices(ranges,opts_r))
|
|
|
elif args.endswith('.py'):
|
|
|
filename = make_filename(args)
|
|
|
data = ''
|
|
|
use_temp = 0
|
|
|
elif args:
|
|
|
try:
|
|
|
# Load the parameter given as a variable. If not a string,
|
|
|
# process it as an object instead (below)
|
|
|
|
|
|
#print '*** args',args,'type',type(args) # dbg
|
|
|
data = eval(args,self.shell.user_ns)
|
|
|
if not type(data) in StringTypes:
|
|
|
raise DataIsObject
|
|
|
|
|
|
except (NameError,SyntaxError):
|
|
|
# given argument is not a variable, try as a filename
|
|
|
filename = make_filename(args)
|
|
|
if filename is None:
|
|
|
warn("Argument given (%s) can't be found as a variable "
|
|
|
"or as a filename." % args)
|
|
|
return
|
|
|
|
|
|
data = ''
|
|
|
use_temp = 0
|
|
|
except DataIsObject:
|
|
|
|
|
|
# macros have a special edit function
|
|
|
if isinstance(data,Macro):
|
|
|
self._edit_macro(args,data)
|
|
|
return
|
|
|
|
|
|
# For objects, try to edit the file where they are defined
|
|
|
try:
|
|
|
filename = inspect.getabsfile(data)
|
|
|
if 'fakemodule' in filename.lower() and inspect.isclass(data):
|
|
|
# class created by %edit? Try to find source
|
|
|
# by looking for method definitions instead, the
|
|
|
# __module__ in those classes is FakeModule.
|
|
|
attrs = [getattr(data, aname) for aname in dir(data)]
|
|
|
for attr in attrs:
|
|
|
if not inspect.ismethod(attr):
|
|
|
continue
|
|
|
filename = inspect.getabsfile(attr)
|
|
|
if filename and 'fakemodule' not in filename.lower():
|
|
|
# change the attribute to be the edit target instead
|
|
|
data = attr
|
|
|
break
|
|
|
|
|
|
datafile = 1
|
|
|
except TypeError:
|
|
|
filename = make_filename(args)
|
|
|
datafile = 1
|
|
|
warn('Could not find file where `%s` is defined.\n'
|
|
|
'Opening a file named `%s`' % (args,filename))
|
|
|
# Now, make sure we can actually read the source (if it was in
|
|
|
# a temp file it's gone by now).
|
|
|
if datafile:
|
|
|
try:
|
|
|
if lineno is None:
|
|
|
lineno = inspect.getsourcelines(data)[1]
|
|
|
except IOError:
|
|
|
filename = make_filename(args)
|
|
|
if filename is None:
|
|
|
warn('The file `%s` where `%s` was defined cannot '
|
|
|
'be read.' % (filename,data))
|
|
|
return
|
|
|
use_temp = 0
|
|
|
else:
|
|
|
data = ''
|
|
|
|
|
|
if use_temp:
|
|
|
filename = self.shell.mktempfile(data)
|
|
|
print('IPython will make a temporary file named:', filename)
|
|
|
|
|
|
# Make sure we send to the client an absolute path, in case the working
|
|
|
# directory of client and kernel don't match
|
|
|
filename = os.path.abspath(filename)
|
|
|
|
|
|
payload = {
|
|
|
'source' : 'IPython.zmq.zmqshell.ZMQInteractiveShell.edit_magic',
|
|
|
'filename' : filename,
|
|
|
'line_number' : lineno
|
|
|
}
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def magic_gui(self, *args, **kwargs):
|
|
|
raise NotImplementedError(
|
|
|
'GUI support must be enabled in command line options.')
|
|
|
|
|
|
def magic_pylab(self, *args, **kwargs):
|
|
|
raise NotImplementedError(
|
|
|
'pylab support must be enabled in command line options.')
|
|
|
|
|
|
# A few magics that are adapted to the specifics of using pexpect and a
|
|
|
# remote terminal
|
|
|
|
|
|
def magic_clear(self, arg_s):
|
|
|
"""Clear the terminal."""
|
|
|
if os.name == 'posix':
|
|
|
self.shell.system("clear")
|
|
|
else:
|
|
|
self.shell.system("cls")
|
|
|
|
|
|
if os.name == 'nt':
|
|
|
# This is the usual name in windows
|
|
|
magic_cls = magic_clear
|
|
|
|
|
|
# Terminal pagers won't work over pexpect, but we do have our own pager
|
|
|
|
|
|
def magic_less(self, arg_s):
|
|
|
"""Show a file through the pager.
|
|
|
|
|
|
Files ending in .py are syntax-highlighted."""
|
|
|
cont = open(arg_s).read()
|
|
|
if arg_s.endswith('.py'):
|
|
|
cont = self.shell.pycolorize(cont)
|
|
|
page.page(cont)
|
|
|
|
|
|
magic_more = magic_less
|
|
|
|
|
|
# Man calls a pager, so we also need to redefine it
|
|
|
if os.name == 'posix':
|
|
|
def magic_man(self, arg_s):
|
|
|
"""Find the man page for the given command and display in pager."""
|
|
|
page.page(self.shell.getoutput('man %s | col -b' % arg_s,
|
|
|
split=False))
|
|
|
|
|
|
# FIXME: this is specific to the GUI, so we should let the gui app load
|
|
|
# magics at startup that are only for the gui. Once the gui app has proper
|
|
|
# profile and configuration management, we can have it initialize a kernel
|
|
|
# with a special config file that provides these.
|
|
|
def magic_guiref(self, arg_s):
|
|
|
"""Show a basic reference about the GUI console."""
|
|
|
from IPython.core.usage import gui_reference
|
|
|
page.page(gui_reference, auto_html=True)
|
|
|
|
|
|
def magic_loadpy(self, arg_s):
|
|
|
"""Load a .py python script into the GUI console.
|
|
|
|
|
|
This magic command can either take a local filename or a url::
|
|
|
|
|
|
%loadpy myscript.py
|
|
|
%loadpy http://www.example.com/myscript.py
|
|
|
"""
|
|
|
if not arg_s.endswith('.py'):
|
|
|
raise ValueError('%%load only works with .py files: %s' % arg_s)
|
|
|
if arg_s.startswith('http'):
|
|
|
import urllib2
|
|
|
response = urllib2.urlopen(arg_s)
|
|
|
content = response.read()
|
|
|
else:
|
|
|
content = open(arg_s).read()
|
|
|
payload = dict(
|
|
|
source='IPython.zmq.zmqshell.ZMQInteractiveShell.magic_loadpy',
|
|
|
text=content
|
|
|
)
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def magic_Exit(self, parameter_s=''):
|
|
|
"""Exit IPython. If the -k option is provided, the kernel will be left
|
|
|
running. Otherwise, it will shutdown without prompting.
|
|
|
"""
|
|
|
opts,args = self.parse_options(parameter_s,'k')
|
|
|
self.shell.keepkernel_on_exit = opts.has_key('k')
|
|
|
self.shell.ask_exit()
|
|
|
|
|
|
# Add aliases as magics so all common forms work: exit, quit, Exit, Quit.
|
|
|
magic_exit = magic_quit = magic_Quit = magic_Exit
|
|
|
|
|
|
InteractiveShellABC.register(ZMQInteractiveShell)
|
|
|
|
