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#!/usr/bin/env python
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# encoding: utf-8
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"""
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The :class:`~IPython.core.application.Application` object for the command
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line :command:`ipython` program.
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Authors
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-------
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* Brian Granger
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* Fernando Perez
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* Min Ragan-Kelley
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2010 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import absolute_import
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import logging
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import os
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import sys
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from IPython.config.loader import (
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Config, PyFileConfigLoader
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)
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from IPython.config.application import boolean_flag
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from IPython.core import release
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from IPython.core import usage
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from IPython.core.crashhandler import CrashHandler
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from IPython.core.formatters import PlainTextFormatter
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from IPython.core.application import (
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ProfileDir, BaseIPythonApplication, base_flags, base_aliases
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)
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from IPython.core.shellapp import (
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InteractiveShellApp, shell_flags, shell_aliases
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)
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from IPython.frontend.terminal.interactiveshell import TerminalInteractiveShell
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from IPython.lib import inputhook
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from IPython.utils import warn
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from IPython.utils.path import get_ipython_dir, check_for_old_config
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from IPython.utils.traitlets import (
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Bool, List, Dict, CaselessStrEnum
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)
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#-----------------------------------------------------------------------------
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# Globals, utilities and helpers
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#-----------------------------------------------------------------------------
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#: The default config file name for this application.
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default_config_file_name = u'ipython_config.py'
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_examples = """
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ipython --pylab # start in pylab mode
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ipython --pylab=qt # start in pylab mode with the qt4 backend
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ipython --log-level=DEBUG # set logging to DEBUG
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ipython --profile=foo # start with profile foo
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ipython qtconsole # start the qtconsole GUI application
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ipython qtconsole -h # show the help string for the qtconsole subcmd
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ipython profile create foo # create profile foo w/ default config files
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ipython profile -h # show the help string for the profile subcmd
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"""
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#-----------------------------------------------------------------------------
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# Crash handler for this application
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#-----------------------------------------------------------------------------
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class IPAppCrashHandler(CrashHandler):
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"""sys.excepthook for IPython itself, leaves a detailed report on disk."""
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def __init__(self, app):
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contact_name = release.authors['Fernando'][0]
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contact_email = release.authors['Fernando'][1]
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bug_tracker = 'http://github.com/ipython/ipython/issues'
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super(IPAppCrashHandler,self).__init__(
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app, contact_name, contact_email, bug_tracker
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)
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def make_report(self,traceback):
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"""Return a string containing a crash report."""
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sec_sep = self.section_sep
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# Start with parent report
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report = [super(IPAppCrashHandler, self).make_report(traceback)]
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# Add interactive-specific info we may have
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rpt_add = report.append
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try:
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rpt_add(sec_sep+"History of session input:")
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for line in self.app.shell.user_ns['_ih']:
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rpt_add(line)
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rpt_add('\n*** Last line of input (may not be in above history):\n')
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rpt_add(self.app.shell._last_input_line+'\n')
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except:
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pass
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return ''.join(report)
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#-----------------------------------------------------------------------------
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# Aliases and Flags
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#-----------------------------------------------------------------------------
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flags = dict(base_flags)
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flags.update(shell_flags)
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addflag = lambda *args: flags.update(boolean_flag(*args))
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addflag('autoedit-syntax', 'TerminalInteractiveShell.autoedit_syntax',
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'Turn on auto editing of files with syntax errors.',
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'Turn off auto editing of files with syntax errors.'
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)
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addflag('banner', 'TerminalIPythonApp.display_banner',
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"Display a banner upon starting IPython.",
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"Don't display a banner upon starting IPython."
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)
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addflag('confirm-exit', 'TerminalInteractiveShell.confirm_exit',
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"""Set to confirm when you try to exit IPython with an EOF (Control-D
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in Unix, Control-Z/Enter in Windows). By typing 'exit' or 'quit',
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you can force a direct exit without any confirmation.""",
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"Don't prompt the user when exiting."
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)
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addflag('term-title', 'TerminalInteractiveShell.term_title',
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"Enable auto setting the terminal title.",
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"Disable auto setting the terminal title."
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)
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classic_config = Config()
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classic_config.InteractiveShell.cache_size = 0
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classic_config.PlainTextFormatter.pprint = False
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classic_config.InteractiveShell.prompt_in1 = '>>> '
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classic_config.InteractiveShell.prompt_in2 = '... '
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classic_config.InteractiveShell.prompt_out = ''
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classic_config.InteractiveShell.separate_in = ''
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classic_config.InteractiveShell.separate_out = ''
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classic_config.InteractiveShell.separate_out2 = ''
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classic_config.InteractiveShell.colors = 'NoColor'
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classic_config.InteractiveShell.xmode = 'Plain'
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flags['classic']=(
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classic_config,
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"Gives IPython a similar feel to the classic Python prompt."
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)
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# # log doesn't make so much sense this way anymore
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# paa('--log','-l',
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# action='store_true', dest='InteractiveShell.logstart',
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# help="Start logging to the default log file (./ipython_log.py).")
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#
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# # quick is harder to implement
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flags['quick']=(
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{'TerminalIPythonApp' : {'quick' : True}},
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"Enable quick startup with no config files."
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)
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flags['i'] = (
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{'TerminalIPythonApp' : {'force_interact' : True}},
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"""If running code from the command line, become interactive afterwards.
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Note: can also be given simply as '-i.'"""
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)
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flags['pylab'] = (
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{'TerminalIPythonApp' : {'pylab' : 'auto'}},
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"""Pre-load matplotlib and numpy for interactive use with
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the default matplotlib backend."""
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)
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aliases = dict(base_aliases)
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aliases.update(shell_aliases)
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# it's possible we don't want short aliases for *all* of these:
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aliases.update(dict(
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gui='TerminalIPythonApp.gui',
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pylab='TerminalIPythonApp.pylab',
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))
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#-----------------------------------------------------------------------------
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# Main classes and functions
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#-----------------------------------------------------------------------------
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class TerminalIPythonApp(BaseIPythonApplication, InteractiveShellApp):
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name = u'ipython'
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description = usage.cl_usage
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default_config_file_name = default_config_file_name
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crash_handler_class = IPAppCrashHandler
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examples = _examples
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flags = Dict(flags)
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aliases = Dict(aliases)
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classes = List()
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def _classes_default(self):
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"""This has to be in a method, for TerminalIPythonApp to be available."""
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return [
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InteractiveShellApp, # ShellApp comes before TerminalApp, because
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self.__class__, # it will also affect subclasses (e.g. QtConsole)
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TerminalInteractiveShell,
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ProfileDir,
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PlainTextFormatter,
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]
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subcommands = Dict(dict(
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qtconsole=('IPython.frontend.qt.console.qtconsoleapp.IPythonQtConsoleApp',
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"""Launch the IPython Qt Console."""
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),
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profile = ("IPython.core.profileapp.ProfileApp",
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"Create and manage IPython profiles.")
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))
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# *do* autocreate requested profile, but don't create the config file.
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auto_create=Bool(True)
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# configurables
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ignore_old_config=Bool(False, config=True,
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help="Suppress warning messages about legacy config files"
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)
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quick = Bool(False, config=True,
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help="""Start IPython quickly by skipping the loading of config files."""
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)
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def _quick_changed(self, name, old, new):
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if new:
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self.load_config_file = lambda *a, **kw: None
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self.ignore_old_config=True
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gui = CaselessStrEnum(('qt','wx','gtk'), config=True,
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help="Enable GUI event loop integration ('qt', 'wx', 'gtk')."
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)
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pylab = CaselessStrEnum(['tk', 'qt', 'wx', 'gtk', 'osx', 'auto'],
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config=True,
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help="""Pre-load matplotlib and numpy for interactive use,
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selecting a particular matplotlib backend and loop integration.
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"""
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)
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display_banner = Bool(True, config=True,
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help="Whether to display a banner upon starting IPython."
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)
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# if there is code of files to run from the cmd line, don't interact
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# unless the --i flag (App.force_interact) is true.
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force_interact = Bool(False, config=True,
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help="""If a command or file is given via the command-line,
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e.g. 'ipython foo.py"""
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)
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def _force_interact_changed(self, name, old, new):
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if new:
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self.interact = True
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def _file_to_run_changed(self, name, old, new):
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if new and not self.force_interact:
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self.interact = False
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_code_to_run_changed = _file_to_run_changed
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# internal, not-configurable
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interact=Bool(True)
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def parse_command_line(self, argv=None):
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"""override to allow old '-pylab' flag with deprecation warning"""
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argv = sys.argv[1:] if argv is None else argv
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if '-pylab' in argv:
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# deprecated `-pylab` given,
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# warn and transform into current syntax
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argv = argv[:] # copy, don't clobber
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idx = argv.index('-pylab')
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warn.warn("`-pylab` flag has been deprecated.\n"
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" Use `--pylab` instead, or `--pylab=foo` to specify a backend.")
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sub = '--pylab'
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if len(argv) > idx+1:
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# check for gui arg, as in '-pylab qt'
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gui = argv[idx+1]
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if gui in ('wx', 'qt', 'qt4', 'gtk', 'auto'):
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sub = '--pylab='+gui
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argv.pop(idx+1)
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argv[idx] = sub
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return super(TerminalIPythonApp, self).parse_command_line(argv)
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def initialize(self, argv=None):
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"""Do actions after construct, but before starting the app."""
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super(TerminalIPythonApp, self).initialize(argv)
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if self.subapp is not None:
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# don't bother initializing further, starting subapp
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return
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if not self.ignore_old_config:
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check_for_old_config(self.ipython_dir)
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# print self.extra_args
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if self.extra_args:
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self.file_to_run = self.extra_args[0]
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# create the shell
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self.init_shell()
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# and draw the banner
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self.init_banner()
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# Now a variety of things that happen after the banner is printed.
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self.init_gui_pylab()
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self.init_extensions()
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self.init_code()
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def init_shell(self):
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"""initialize the InteractiveShell instance"""
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# I am a little hesitant to put these into InteractiveShell itself.
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# But that might be the place for them
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sys.path.insert(0, '')
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# Create an InteractiveShell instance.
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# shell.display_banner should always be False for the terminal
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# based app, because we call shell.show_banner() by hand below
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# so the banner shows *before* all extension loading stuff.
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self.shell = TerminalInteractiveShell.instance(config=self.config,
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display_banner=False, profile_dir=self.profile_dir,
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ipython_dir=self.ipython_dir)
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def init_banner(self):
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"""optionally display the banner"""
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if self.display_banner and self.interact:
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self.shell.show_banner()
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# Make sure there is a space below the banner.
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if self.log_level <= logging.INFO: print
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def init_gui_pylab(self):
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"""Enable GUI event loop integration, taking pylab into account."""
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gui = self.gui
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# Using `pylab` will also require gui activation, though which toolkit
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# to use may be chosen automatically based on mpl configuration.
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if self.pylab:
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activate = self.shell.enable_pylab
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if self.pylab == 'auto':
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gui = None
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else:
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gui = self.pylab
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else:
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# Enable only GUI integration, no pylab
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activate = inputhook.enable_gui
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if gui or self.pylab:
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try:
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self.log.info("Enabling GUI event loop integration, "
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"toolkit=%s, pylab=%s" % (gui, self.pylab) )
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activate(gui)
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except:
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self.log.warn("Error in enabling GUI event loop integration:")
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self.shell.showtraceback()
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def start(self):
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if self.subapp is not None:
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return self.subapp.start()
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# perform any prexec steps:
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if self.interact:
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self.log.debug("Starting IPython's mainloop...")
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self.shell.mainloop()
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else:
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self.log.debug("IPython not interactive...")
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def load_default_config(ipython_dir=None):
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"""Load the default config file from the default ipython_dir.
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This is useful for embedded shells.
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"""
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if ipython_dir is None:
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ipython_dir = get_ipython_dir()
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profile_dir = os.path.join(ipython_dir, 'profile_default')
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cl = PyFileConfigLoader(default_config_file_name, profile_dir)
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try:
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config = cl.load_config()
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except IOError:
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# no config found
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config = Config()
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return config
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def launch_new_instance():
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"""Create and run a full blown IPython instance"""
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app = TerminalIPythonApp.instance()
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app.initialize()
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app.start()
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if __name__ == '__main__':
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launch_new_instance()
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