|
|
"""A ZMQ-based subclass of InteractiveShell.
|
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|
|
|
|
This code is meant to ease the refactoring of the base InteractiveShell into
|
|
|
something with a cleaner architecture for 2-process use, without actually
|
|
|
breaking InteractiveShell itself. So we're doing something a bit ugly, where
|
|
|
we subclass and override what we want to fix. Once this is working well, we
|
|
|
can go back to the base class and refactor the code for a cleaner inheritance
|
|
|
implementation that doesn't rely on so much monkeypatching.
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|
|
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|
But this lets us maintain a fully working IPython as we develop the new
|
|
|
machinery. This should thus be thought of as scaffolding.
|
|
|
"""
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|
|
#-----------------------------------------------------------------------------
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|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
from __future__ import print_function
|
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# Stdlib
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import os
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|
import sys
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import time
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|
|
|
# System library imports
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from zmq.eventloop import ioloop
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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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from IPython.core import page
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|
|
from IPython.core.autocall import ZMQExitAutocall
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|
|
from IPython.core.displaypub import DisplayPublisher
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|
|
from IPython.core.error import UsageError
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from IPython.core.magics import MacroToEdit, CodeMagics
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from IPython.core.magic import magics_class, line_magic, Magics
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from IPython.core.payloadpage import install_payload_page
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|
from IPython.display import display, Javascript
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|
from IPython.kernel.inprocess.socket import SocketABC
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|
from IPython.kernel import (
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get_connection_file, get_connection_info, connect_qtconsole
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|
|
)
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|
|
from IPython.testing.skipdoctest import skip_doctest
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|
|
from IPython.utils import openpy
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|
|
from IPython.utils.jsonutil import json_clean, encode_images
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|
|
from IPython.utils.process import arg_split
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|
|
from IPython.utils import py3compat
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|
|
from IPython.utils.py3compat import unicode_type
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|
|
from IPython.utils.traitlets import Instance, Type, Dict, CBool, CBytes, Any
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|
|
from IPython.utils.warn import error
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|
|
from IPython.kernel.zmq.displayhook import ZMQShellDisplayHook
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|
from IPython.kernel.zmq.datapub import ZMQDataPublisher
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|
|
from IPython.kernel.zmq.session import extract_header
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|
from IPython.kernel.comm import CommManager
|
|
|
from .session import Session
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#-----------------------------------------------------------------------------
|
|
|
# Functions and classes
|
|
|
#-----------------------------------------------------------------------------
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class ZMQDisplayPublisher(DisplayPublisher):
|
|
|
"""A display publisher that publishes data using a ZeroMQ PUB socket."""
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|
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session = Instance(Session)
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pub_socket = Instance(SocketABC)
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|
|
parent_header = Dict({})
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|
topic = CBytes(b'display_data')
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|
|
def set_parent(self, parent):
|
|
|
"""Set the parent for outbound messages."""
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|
|
self.parent_header = extract_header(parent)
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|
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|
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def _flush_streams(self):
|
|
|
"""flush IO Streams prior to display"""
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|
|
sys.stdout.flush()
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|
|
sys.stderr.flush()
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|
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def publish(self, source, data, metadata=None):
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|
|
self._flush_streams()
|
|
|
if metadata is None:
|
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|
metadata = {}
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|
self._validate_data(source, data, metadata)
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|
content = {}
|
|
|
content['source'] = source
|
|
|
content['data'] = encode_images(data)
|
|
|
content['metadata'] = metadata
|
|
|
self.session.send(
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|
self.pub_socket, u'display_data', json_clean(content),
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|
|
parent=self.parent_header, ident=self.topic,
|
|
|
)
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|
|
|
def clear_output(self, wait=False):
|
|
|
content = dict(wait=wait)
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|
|
print('\r', file=sys.stdout, end='')
|
|
|
print('\r', file=sys.stderr, end='')
|
|
|
self._flush_streams()
|
|
|
|
|
|
self.session.send(
|
|
|
self.pub_socket, u'clear_output', content,
|
|
|
parent=self.parent_header, ident=self.topic,
|
|
|
)
|
|
|
|
|
|
@magics_class
|
|
|
class KernelMagics(Magics):
|
|
|
#------------------------------------------------------------------------
|
|
|
# Magic overrides
|
|
|
#------------------------------------------------------------------------
|
|
|
# Once the base class stops inheriting from magic, this code needs to be
|
|
|
# moved into a separate machinery as well. For now, at least isolate here
|
|
|
# the magics which this class needs to implement differently from the base
|
|
|
# class, or that are unique to it.
|
|
|
|
|
|
@line_magic
|
|
|
def doctest_mode(self, parameter_s=''):
|
|
|
"""Toggle doctest mode on and off.
|
|
|
|
|
|
This mode is intended to make IPython behave as much as possible like a
|
|
|
plain Python shell, from the perspective of how its prompts, exceptions
|
|
|
and output look. This makes it easy to copy and paste parts of a
|
|
|
session into doctests. It does so by:
|
|
|
|
|
|
- Changing the prompts to the classic ``>>>`` ones.
|
|
|
- Changing the exception reporting mode to 'Plain'.
|
|
|
- Disabling pretty-printing of output.
|
|
|
|
|
|
Note that IPython also supports the pasting of code snippets that have
|
|
|
leading '>>>' and '...' prompts in them. This means that you can paste
|
|
|
doctests from files or docstrings (even if they have leading
|
|
|
whitespace), and the code will execute correctly. You can then use
|
|
|
'%history -t' to see the translated history; this will give you the
|
|
|
input after removal of all the leading prompts and whitespace, which
|
|
|
can be pasted back into an editor.
|
|
|
|
|
|
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.
|
|
|
"""
|
|
|
|
|
|
from IPython.utils.ipstruct import Struct
|
|
|
|
|
|
# Shorthands
|
|
|
shell = self.shell
|
|
|
disp_formatter = self.shell.display_formatter
|
|
|
ptformatter = disp_formatter.formatters['text/plain']
|
|
|
# dstore is a data store kept in the instance metadata bag to track any
|
|
|
# changes we make, so we can undo them later.
|
|
|
dstore = shell.meta.setdefault('doctest_mode', Struct())
|
|
|
save_dstore = dstore.setdefault
|
|
|
|
|
|
# save a few values we'll need to recover later
|
|
|
mode = save_dstore('mode', False)
|
|
|
save_dstore('rc_pprint', ptformatter.pprint)
|
|
|
save_dstore('rc_active_types',disp_formatter.active_types)
|
|
|
save_dstore('xmode', shell.InteractiveTB.mode)
|
|
|
|
|
|
if mode == False:
|
|
|
# turn on
|
|
|
ptformatter.pprint = False
|
|
|
disp_formatter.active_types = ['text/plain']
|
|
|
shell.magic('xmode Plain')
|
|
|
else:
|
|
|
# turn off
|
|
|
ptformatter.pprint = dstore.rc_pprint
|
|
|
disp_formatter.active_types = dstore.rc_active_types
|
|
|
shell.magic("xmode " + dstore.xmode)
|
|
|
|
|
|
# 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='doctest_mode',
|
|
|
mode=dstore.mode)
|
|
|
shell.payload_manager.write_payload(payload)
|
|
|
|
|
|
|
|
|
_find_edit_target = CodeMagics._find_edit_target
|
|
|
|
|
|
@skip_doctest
|
|
|
@line_magic
|
|
|
def edit(self, parameter_s='', last_call=['','']):
|
|
|
"""Bring up an editor and execute the resulting code.
|
|
|
|
|
|
Usage:
|
|
|
%edit [options] [args]
|
|
|
|
|
|
%edit runs an external text editor. You will need to set the command for
|
|
|
this editor via the ``TerminalInteractiveShell.editor`` option in your
|
|
|
configuration file before it will work.
|
|
|
|
|
|
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
|
|
|
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.
|
|
|
|
|
|
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.
|
|
|
|
|
|
Unlike in the terminal, this is designed to use a GUI editor, and we do
|
|
|
not know when it has closed. So the file you edit will not be
|
|
|
automatically executed or printed.
|
|
|
|
|
|
Note that %edit is also available through the alias %ed.
|
|
|
"""
|
|
|
|
|
|
opts,args = self.parse_options(parameter_s,'prn:')
|
|
|
|
|
|
try:
|
|
|
filename, lineno, _ = CodeMagics._find_edit_target(self.shell, args, opts, last_call)
|
|
|
except MacroToEdit as e:
|
|
|
# TODO: Implement macro editing over 2 processes.
|
|
|
print("Macro editing not yet implemented in 2-process model.")
|
|
|
return
|
|
|
|
|
|
# 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' : 'edit_magic',
|
|
|
'filename' : filename,
|
|
|
'line_number' : lineno
|
|
|
}
|
|
|
self.shell.payload_manager.write_payload(payload)
|
|
|
|
|
|
# A few magics that are adapted to the specifics of using pexpect and a
|
|
|
# remote terminal
|
|
|
|
|
|
@line_magic
|
|
|
def 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
|
|
|
cls = line_magic('cls')(clear)
|
|
|
|
|
|
# Terminal pagers won't work over pexpect, but we do have our own pager
|
|
|
|
|
|
@line_magic
|
|
|
def less(self, arg_s):
|
|
|
"""Show a file through the pager.
|
|
|
|
|
|
Files ending in .py are syntax-highlighted."""
|
|
|
if not arg_s:
|
|
|
raise UsageError('Missing filename.')
|
|
|
|
|
|
cont = open(arg_s).read()
|
|
|
if arg_s.endswith('.py'):
|
|
|
cont = self.shell.pycolorize(openpy.read_py_file(arg_s, skip_encoding_cookie=False))
|
|
|
else:
|
|
|
cont = open(arg_s).read()
|
|
|
page.page(cont)
|
|
|
|
|
|
more = line_magic('more')(less)
|
|
|
|
|
|
# Man calls a pager, so we also need to redefine it
|
|
|
if os.name == 'posix':
|
|
|
@line_magic
|
|
|
def 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))
|
|
|
|
|
|
@line_magic
|
|
|
def connect_info(self, arg_s):
|
|
|
"""Print information for connecting other clients to this kernel
|
|
|
|
|
|
It will print the contents of this session's connection file, as well as
|
|
|
shortcuts for local clients.
|
|
|
|
|
|
In the simplest case, when called from the most recently launched kernel,
|
|
|
secondary clients can be connected, simply with:
|
|
|
|
|
|
$> ipython <app> --existing
|
|
|
|
|
|
"""
|
|
|
|
|
|
from IPython.core.application import BaseIPythonApplication as BaseIPApp
|
|
|
|
|
|
if BaseIPApp.initialized():
|
|
|
app = BaseIPApp.instance()
|
|
|
security_dir = app.profile_dir.security_dir
|
|
|
profile = app.profile
|
|
|
else:
|
|
|
profile = 'default'
|
|
|
security_dir = ''
|
|
|
|
|
|
try:
|
|
|
connection_file = get_connection_file()
|
|
|
info = get_connection_info(unpack=False)
|
|
|
except Exception as e:
|
|
|
error("Could not get connection info: %r" % e)
|
|
|
return
|
|
|
|
|
|
# add profile flag for non-default profile
|
|
|
profile_flag = "--profile %s" % profile if profile != 'default' else ""
|
|
|
|
|
|
# if it's in the security dir, truncate to basename
|
|
|
if security_dir == os.path.dirname(connection_file):
|
|
|
connection_file = os.path.basename(connection_file)
|
|
|
|
|
|
|
|
|
print (info + '\n')
|
|
|
print ("Paste the above JSON into a file, and connect with:\n"
|
|
|
" $> ipython <app> --existing <file>\n"
|
|
|
"or, if you are local, you can connect with just:\n"
|
|
|
" $> ipython <app> --existing {0} {1}\n"
|
|
|
"or even just:\n"
|
|
|
" $> ipython <app> --existing {1}\n"
|
|
|
"if this is the most recent IPython session you have started.".format(
|
|
|
connection_file, profile_flag
|
|
|
)
|
|
|
)
|
|
|
|
|
|
@line_magic
|
|
|
def qtconsole(self, arg_s):
|
|
|
"""Open a qtconsole connected to this kernel.
|
|
|
|
|
|
Useful for connecting a qtconsole to running notebooks, for better
|
|
|
debugging.
|
|
|
"""
|
|
|
|
|
|
# %qtconsole should imply bind_kernel for engines:
|
|
|
try:
|
|
|
from IPython.parallel import bind_kernel
|
|
|
except ImportError:
|
|
|
# technically possible, because parallel has higher pyzmq min-version
|
|
|
pass
|
|
|
else:
|
|
|
bind_kernel()
|
|
|
|
|
|
try:
|
|
|
p = connect_qtconsole(argv=arg_split(arg_s, os.name=='posix'))
|
|
|
except Exception as e:
|
|
|
error("Could not start qtconsole: %r" % e)
|
|
|
return
|
|
|
|
|
|
@line_magic
|
|
|
def autosave(self, arg_s):
|
|
|
"""Set the autosave interval in the notebook (in seconds).
|
|
|
|
|
|
The default value is 120, or two minutes.
|
|
|
``%autosave 0`` will disable autosave.
|
|
|
|
|
|
This magic only has an effect when called from the notebook interface.
|
|
|
It has no effect when called in a startup file.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
interval = int(arg_s)
|
|
|
except ValueError:
|
|
|
raise UsageError("%%autosave requires an integer, got %r" % arg_s)
|
|
|
|
|
|
# javascript wants milliseconds
|
|
|
milliseconds = 1000 * interval
|
|
|
display(Javascript("IPython.notebook.set_autosave_interval(%i)" % milliseconds),
|
|
|
include=['application/javascript']
|
|
|
)
|
|
|
if interval:
|
|
|
print("Autosaving every %i seconds" % interval)
|
|
|
else:
|
|
|
print("Autosave disabled")
|
|
|
|
|
|
|
|
|
class ZMQInteractiveShell(InteractiveShell):
|
|
|
"""A subclass of InteractiveShell for ZMQ."""
|
|
|
|
|
|
displayhook_class = Type(ZMQShellDisplayHook)
|
|
|
display_pub_class = Type(ZMQDisplayPublisher)
|
|
|
data_pub_class = Type(ZMQDataPublisher)
|
|
|
kernel = Any()
|
|
|
parent_header = Any()
|
|
|
|
|
|
# Override the traitlet in the parent class, because there's no point using
|
|
|
# readline for the kernel. Can be removed when the readline code is moved
|
|
|
# to the terminal frontend.
|
|
|
colors_force = CBool(True)
|
|
|
readline_use = CBool(False)
|
|
|
# autoindent has no meaning in a zmqshell, and attempting to enable it
|
|
|
# will print a warning in the absence of readline.
|
|
|
autoindent = CBool(False)
|
|
|
|
|
|
exiter = Instance(ZMQExitAutocall)
|
|
|
def _exiter_default(self):
|
|
|
return ZMQExitAutocall(self)
|
|
|
|
|
|
def _exit_now_changed(self, name, old, new):
|
|
|
"""stop eventloop when exit_now fires"""
|
|
|
if new:
|
|
|
loop = ioloop.IOLoop.instance()
|
|
|
loop.add_timeout(time.time()+0.1, loop.stop)
|
|
|
|
|
|
keepkernel_on_exit = None
|
|
|
|
|
|
# Over ZeroMQ, GUI control isn't done with PyOS_InputHook as there is no
|
|
|
# interactive input being read; we provide event loop support in ipkernel
|
|
|
@staticmethod
|
|
|
def enable_gui(gui):
|
|
|
from .eventloops import enable_gui as real_enable_gui
|
|
|
try:
|
|
|
real_enable_gui(gui)
|
|
|
except ValueError as e:
|
|
|
raise UsageError("%s" % e)
|
|
|
|
|
|
def init_environment(self):
|
|
|
"""Configure the user's environment.
|
|
|
|
|
|
"""
|
|
|
env = os.environ
|
|
|
# These two ensure 'ls' produces nice coloring on BSD-derived systems
|
|
|
env['TERM'] = 'xterm-color'
|
|
|
env['CLICOLOR'] = '1'
|
|
|
# Since normal pagers don't work at all (over pexpect we don't have
|
|
|
# single-key control of the subprocess), try to disable paging in
|
|
|
# subprocesses as much as possible.
|
|
|
env['PAGER'] = 'cat'
|
|
|
env['GIT_PAGER'] = 'cat'
|
|
|
|
|
|
# And install the payload version of page.
|
|
|
install_payload_page()
|
|
|
|
|
|
def auto_rewrite_input(self, cmd):
|
|
|
"""Called to show the auto-rewritten input for autocall and friends.
|
|
|
|
|
|
FIXME: this payload is currently not correctly processed by the
|
|
|
frontend.
|
|
|
"""
|
|
|
new = self.prompt_manager.render('rewrite') + cmd
|
|
|
payload = dict(
|
|
|
source='auto_rewrite_input',
|
|
|
transformed_input=new,
|
|
|
)
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def ask_exit(self):
|
|
|
"""Engage the exit actions."""
|
|
|
self.exit_now = True
|
|
|
payload = dict(
|
|
|
source='ask_exit',
|
|
|
exit=True,
|
|
|
keepkernel=self.keepkernel_on_exit,
|
|
|
)
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def _showtraceback(self, etype, evalue, stb):
|
|
|
# try to preserve ordering of tracebacks and print statements
|
|
|
sys.stdout.flush()
|
|
|
sys.stderr.flush()
|
|
|
|
|
|
exc_content = {
|
|
|
u'traceback' : stb,
|
|
|
u'ename' : unicode_type(etype.__name__),
|
|
|
u'evalue' : py3compat.safe_unicode(evalue),
|
|
|
}
|
|
|
|
|
|
dh = self.displayhook
|
|
|
# Send exception info over pub socket for other clients than the caller
|
|
|
# to pick up
|
|
|
topic = None
|
|
|
if dh.topic:
|
|
|
topic = dh.topic.replace(b'pyout', b'pyerr')
|
|
|
|
|
|
exc_msg = dh.session.send(dh.pub_socket, u'pyerr', json_clean(exc_content), dh.parent_header, ident=topic)
|
|
|
|
|
|
# FIXME - Hack: store exception info in shell object. Right now, the
|
|
|
# caller is reading this info after the fact, we need to fix this logic
|
|
|
# to remove this hack. Even uglier, we need to store the error status
|
|
|
# here, because in the main loop, the logic that sets it is being
|
|
|
# skipped because runlines swallows the exceptions.
|
|
|
exc_content[u'status'] = u'error'
|
|
|
self._reply_content = exc_content
|
|
|
# /FIXME
|
|
|
|
|
|
return exc_content
|
|
|
|
|
|
def set_next_input(self, text):
|
|
|
"""Send the specified text to the frontend to be presented at the next
|
|
|
input cell."""
|
|
|
payload = dict(
|
|
|
source='set_next_input',
|
|
|
text=text
|
|
|
)
|
|
|
self.payload_manager.write_payload(payload)
|
|
|
|
|
|
def set_parent(self, parent):
|
|
|
"""Set the parent header for associating output with its triggering input"""
|
|
|
self.parent_header = parent
|
|
|
self.displayhook.set_parent(parent)
|
|
|
self.display_pub.set_parent(parent)
|
|
|
self.data_pub.set_parent(parent)
|
|
|
try:
|
|
|
sys.stdout.set_parent(parent)
|
|
|
except AttributeError:
|
|
|
pass
|
|
|
try:
|
|
|
sys.stderr.set_parent(parent)
|
|
|
except AttributeError:
|
|
|
pass
|
|
|
|
|
|
def get_parent(self):
|
|
|
return self.parent_header
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
|
# Things related to magics
|
|
|
#-------------------------------------------------------------------------
|
|
|
|
|
|
def init_magics(self):
|
|
|
super(ZMQInteractiveShell, self).init_magics()
|
|
|
self.register_magics(KernelMagics)
|
|
|
self.magics_manager.register_alias('ed', 'edit')
|
|
|
|
|
|
def init_comms(self):
|
|
|
self.comm_manager = CommManager(shell=self, parent=self)
|
|
|
self.configurables.append(self.comm_manager)
|
|
|
|
|
|
|
|
|
InteractiveShellABC.register(ZMQInteractiveShell)
|
|
|
|
