***************************************************************************

IPython post-mortem report

{'commit_hash': u'5c9c918',
 'commit_source': 'installation',
 'default_encoding': 'UTF-8',
 'ipython_path': '/usr/lib/python2.7/dist-packages/IPython',
 'ipython_version': '5.1.0',
 'os_name': 'posix',
 'platform': 'Linux-4.10.0-35-generic-x86_64-with-Ubuntu-17.04-zesty',
 'sys_executable': '/usr/bin/python',
 'sys_platform': 'linux2',
 'sys_version': '2.7.13 (default, Jan 19 2017, 14:48:08) \n[GCC 6.3.0 20170118]'}

***************************************************************************



***************************************************************************

Crash traceback:

---------------------------------------------------------------------------
---------------------------------------------------------------------------
ImportError                                  Python 2.7.13: /usr/bin/python
                                                   Wed Sep 27 12:48:01 2017
A problem occurred executing Python code.  Here is the sequence of function
calls leading up to the error, with the most recent (innermost) call last.
/usr/share/sagemath/bin/sage-ipython in <module>()
      1 #!/usr/bin/env python
      2 # -*- coding: utf-8 -*-
      3 """
      4 Sage IPython startup script.
      5 """
      6 
      7 from sage.repl.interpreter import SageTerminalApp
      8 
      9 app = SageTerminalApp.instance()
---> 10 app.initialize()
        global app.initialize = <bound method SageTerminalApp.initialize of <sage.repl.interpreter.SageTerminalApp object at 0x7f7c28234c90>>
     11 app.start()

<decorator-gen-109> in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)

/usr/lib/python2.7/dist-packages/traitlets/config/application.pyc in catch_config_error(method=<function initialize>, app=<sage.repl.interpreter.SageTerminalApp object>, *args=(None,), **kwargs={})
     72     TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR = False
     73 else:
     74     raise ValueError("Unsupported value for environment variable: 'TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR' is set to '%s' which is none of  {'0', '1', 'false', 'true', ''}."% _envvar )
     75 
     76 
     77 @decorator
     78 def catch_config_error(method, app, *args, **kwargs):
     79     """Method decorator for catching invalid config (Trait/ArgumentErrors) during init.
     80 
     81     On a TraitError (generally caused by bad config), this will print the trait's
     82     message, and exit the app.
     83 
     84     For use on init methods, to prevent invoking excepthook on invalid input.
     85     """
     86     try:
---> 87         return method(app, *args, **kwargs)
        method = <function initialize at 0x7f7c2461ed70>
        app = <sage.repl.interpreter.SageTerminalApp object at 0x7f7c28234c90>
        args = (None,)
        kwargs = {}
     88     except (TraitError, ArgumentError) as e:
     89         app.print_help()
     90         app.log.fatal("Bad config encountered during initialization:")
     91         app.log.fatal(str(e))
     92         app.log.debug("Config at the time: %s", app.config)
     93         app.exit(1)
     94 
     95 
     96 class ApplicationError(Exception):
     97     pass
     98 
     99 
    100 class LevelFormatter(logging.Formatter):
    101     """Formatter with additional `highlevel` record
    102 

/usr/lib/python2.7/dist-packages/IPython/terminal/ipapp.pyc in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)
    294 
    295         return super(TerminalIPythonApp, self).parse_command_line(argv)
    296     
    297     @catch_config_error
    298     def initialize(self, argv=None):
    299         """Do actions after construct, but before starting the app."""
    300         super(TerminalIPythonApp, self).initialize(argv)
    301         if self.subapp is not None:
    302             # don't bother initializing further, starting subapp
    303             return
    304         # print self.extra_args
    305         if self.extra_args and not self.something_to_run:
    306             self.file_to_run = self.extra_args[0]
    307         self.init_path()
    308         # create the shell
--> 309         self.init_shell()
        self.init_shell = <bound method SageTerminalApp.init_shell of <sage.repl.interpreter.SageTerminalApp object at 0x7f7c28234c90>>
    310         # and draw the banner
    311         self.init_banner()
    312         # Now a variety of things that happen after the banner is printed.
    313         self.init_gui_pylab()
    314         self.init_extensions()
    315         self.init_code()
    316 
    317     def init_shell(self):
    318         """initialize the InteractiveShell instance"""
    319         # Create an InteractiveShell instance.
    320         # shell.display_banner should always be False for the terminal
    321         # based app, because we call shell.show_banner() by hand below
    322         # so the banner shows *before* all extension loading stuff.
    323         self.shell = TerminalInteractiveShell.instance(parent=self,
    324                         profile_dir=self.profile_dir,

/usr/lib/python2.7/dist-packages/sage/repl/interpreter.pyc in init_shell(self=<sage.repl.interpreter.SageTerminalApp object>)
    730             This code is based on
    731             :meth:`TerminalIPythonApp.init_shell`.
    732 
    733         EXAMPLES::
    734 
    735             sage: from sage.repl.interpreter import SageTerminalApp
    736             sage: app = SageTerminalApp.instance()
    737             sage: app.shell
    738             <sage.repl.interpreter.SageTestShell object at 0x...>
    739         """
    740         # Shell initialization
    741         self.shell = self.shell_class.instance(
    742             parent=self,
    743             config=self.config,
    744             profile_dir=self.profile_dir,
--> 745             ipython_dir=self.ipython_dir)
        global ipython_dir = undefined
        self.ipython_dir = u'/home/geeko/.ipython'
    746         self.shell.configurables.append(self)
    747         self.shell.has_sage_extensions = SAGE_EXTENSION in self.extensions
    748 
    749         # Load the %lprun extension if available
    750         try:
    751             import line_profiler
    752         except ImportError:
    753             pass
    754         else:
    755             self.extensions.append('line_profiler')
    756 
    757         if self.shell.has_sage_extensions:
    758             self.extensions.remove(SAGE_EXTENSION)
    759 
    760             # load sage extension here to get a crash if

/usr/lib/python2.7/dist-packages/traitlets/config/configurable.pyc in instance(cls=<class 'sage.repl.interpreter.SageTerminalInteractiveShell'>, *args=(), **kwargs={'config': {'InteractiveShell': {'term_title': True, 'color...ue}, 'SageTerminalApp': {'force_interact': True}}, 'ipython_dir': u'/home/geeko/.ipython', 'parent': <sage.repl.interpreter.SageTerminalApp object>, 'profile_dir': <IPython.core.profiledir.ProfileDir object>})
    397             >>> class Foo(SingletonConfigurable): pass
    398             >>> foo = Foo.instance()
    399             >>> foo == Foo.instance()
    400             True
    401 
    402         Create a subclass that is retrived using the base class instance::
    403 
    404             >>> class Bar(SingletonConfigurable): pass
    405             >>> class Bam(Bar): pass
    406             >>> bam = Bam.instance()
    407             >>> bam == Bar.instance()
    408             True
    409         """
    410         # Create and save the instance
    411         if cls._instance is None:
--> 412             inst = cls(*args, **kwargs)
        inst = undefined
        cls = <class 'sage.repl.interpreter.SageTerminalInteractiveShell'>
        args = ()
        kwargs = {'ipython_dir': u'/home/geeko/.ipython', 'profile_dir': <IPython.core.profiledir.ProfileDir object at 0x7f7c24641b50>, 'config': {'InteractiveShell': {'term_title': True, 'colors': 'LightBG', 'confirm_exit': False, 'prompts_class': <class 'sage.repl.prompts.SagePrompts'>, 'separate_in': '', 'ast_node_interactivity': 'all', 'simple_prompt': False}, 'InteractiveShellApp': {'extensions': ['sage']}, 'TerminalIPythonApp': {'shell_class': <class 'sage.repl.interpreter.SageTerminalInteractiveShell'>, 'display_banner': False, 'test_shell': False, 'verbose_crash': True}, 'SageTerminalApp': {'force_interact': True}}, 'parent': <sage.repl.interpreter.SageTerminalApp object at 0x7f7c28234c90>}
    413             # Now make sure that the instance will also be returned by
    414             # parent classes' _instance attribute.
    415             for subclass in cls._walk_mro():
    416                 subclass._instance = inst
    417 
    418         if isinstance(cls._instance, cls):
    419             return cls._instance
    420         else:
    421             raise MultipleInstanceError(
    422                 'Multiple incompatible subclass instances of '
    423                 '%s are being created.' % cls.__name__
    424             )
    425 
    426     @classmethod
    427     def initialized(cls):

/usr/lib/python2.7/dist-packages/IPython/terminal/interactiveshell.pyc in __init__(self=<sage.repl.interpreter.SageTerminalInteractiveShell object>, *args=(), **kwargs={'config': {'InteractiveShell': {'term_title': True, 'color...ue}, 'SageTerminalApp': {'force_interact': True}}, 'ipython_dir': u'/home/geeko/.ipython', 'parent': <sage.repl.interpreter.SageTerminalApp object>, 'profile_dir': <IPython.core.profiledir.ProfileDir object>})
    381 
    382     def init_alias(self):
    383         # The parent class defines aliases that can be safely used with any
    384         # frontend.
    385         super(TerminalInteractiveShell, self).init_alias()
    386 
    387         # Now define aliases that only make sense on the terminal, because they
    388         # need direct access to the console in a way that we can't emulate in
    389         # GUI or web frontend
    390         if os.name == 'posix':
    391             for cmd in ['clear', 'more', 'less', 'man']:
    392                 self.alias_manager.soft_define_alias(cmd, cmd)
    393 
    394 
    395     def __init__(self, *args, **kwargs):
--> 396         super(TerminalInteractiveShell, self).__init__(*args, **kwargs)
        global super = undefined
        global TerminalInteractiveShell = <class 'IPython.terminal.interactiveshell.TerminalInteractiveShell'>
        self.__init__ = <bound method SageTerminalInteractiveShell.__init__ of <sage.repl.interpreter.SageTerminalInteractiveShell object at 0x7f7c24915610>>
        args = ()
        kwargs = {'profile_dir': <IPython.core.profiledir.ProfileDir object at 0x7f7c24641b50>, 'config': {'InteractiveShell': {'term_title': True, 'colors': 'LightBG', 'confirm_exit': False, 'prompts_class': <class 'sage.repl.prompts.SagePrompts'>, 'separate_in': '', 'ast_node_interactivity': 'all', 'simple_prompt': False}, 'InteractiveShellApp': {'extensions': ['sage']}, 'TerminalIPythonApp': {'shell_class': <class 'sage.repl.interpreter.SageTerminalInteractiveShell'>, 'display_banner': False, 'test_shell': False, 'verbose_crash': True}, 'SageTerminalApp': {'force_interact': True}}, 'ipython_dir': u'/home/geeko/.ipython', 'parent': <sage.repl.interpreter.SageTerminalApp object at 0x7f7c28234c90>}
    397         self.init_prompt_toolkit_cli()
    398         self.init_term_title()
    399         self.keep_running = True
    400 
    401         self.debugger_history = InMemoryHistory()
    402 
    403     def ask_exit(self):
    404         self.keep_running = False
    405 
    406     rl_next_input = None
    407 
    408     def pre_prompt(self):
    409         if self.rl_next_input:
    410             self.pt_cli.application.buffer.text = cast_unicode_py2(self.rl_next_input)
    411             self.rl_next_input = None

/usr/lib/python2.7/dist-packages/IPython/core/interactiveshell.pyc in __init__(self=<sage.repl.interpreter.SageTerminalInteractiveShell object>, ipython_dir=u'/home/geeko/.ipython', profile_dir=<IPython.core.profiledir.ProfileDir object>, user_module=None, user_ns=None, custom_exceptions=((), None), **kwargs={'config': {'InteractiveShell': {'term_title': True, 'color...ue}, 'SageTerminalApp': {'force_interact': True}}, 'parent': <sage.repl.interpreter.SageTerminalApp object>})
    487         self.init_builtins()
    488 
    489         # The following was in post_config_initialization
    490         self.init_inspector()
    491         if py3compat.PY3:
    492             self.raw_input_original = input
    493         else:
    494             self.raw_input_original = raw_input
    495         self.init_completer()
    496         # TODO: init_io() needs to happen before init_traceback handlers
    497         # because the traceback handlers hardcode the stdout/stderr streams.
    498         # This logic in in debugger.Pdb and should eventually be changed.
    499         self.init_io()
    500         self.init_traceback_handlers(custom_exceptions)
    501         self.init_prompts()
--> 502         self.init_display_formatter()
        self.init_display_formatter = <bound method SageTerminalInteractiveShell.init_display_formatter of <sage.repl.interpreter.SageTerminalInteractiveShell object at 0x7f7c24915610>>
    503         self.init_display_pub()
    504         self.init_data_pub()
    505         self.init_displayhook()
    506         self.init_magics()
    507         self.init_alias()
    508         self.init_logstart()
    509         self.init_pdb()
    510         self.init_extension_manager()
    511         self.init_payload()
    512         self.init_deprecation_warnings()
    513         self.hooks.late_startup_hook()
    514         self.events.trigger('shell_initialized', self)
    515         atexit.register(self.atexit_operations)
    516 
    517     def get_ipython(self):

/usr/lib/python2.7/dist-packages/sage/repl/interpreter.pyc in init_display_formatter(self=<sage.repl.interpreter.SageTerminalInteractiveShell object>)
    245 
    246         sage: from sage.repl.interpreter import SageTerminalInteractiveShell
    247         sage: SageTerminalInteractiveShell()   # not tested
    248         <sage.repl.interpreter.SageNotebookInteractiveShell object at 0x...>
    249     """
    250 
    251     def init_display_formatter(self):
    252         """
    253         Switch to the Sage IPython commandline rich output backend
    254 
    255         EXAMPLES::
    256 
    257             sage: from sage.repl.interpreter import SageTerminalInteractiveShell
    258             sage: SageTerminalInteractiveShell().init_display_formatter()   # not tested
    259         """
--> 260         from sage.repl.rich_output.backend_ipython import BackendIPythonCommandline
        global sage.repl.rich_output.backend_ipython = undefined
        BackendIPythonCommandline = undefined
    261         backend = BackendIPythonCommandline()
    262         backend.get_display_manager().switch_backend(backend, shell=self)
    263 
    264 
    265 class SageTestShell(SageShellOverride, TerminalInteractiveShell):
    266     """
    267     Test Shell
    268 
    269     Care must be taken in these doctests to quit the test shell in
    270     order to switch back the rich output display backend to the
    271     doctest backend.
    272 
    273     EXAMPLES::
    274 
    275         sage: from sage.repl.interpreter import get_test_shell

/usr/lib/python2.7/dist-packages/sage/repl/rich_output/__init__.py in <module>()
      1 # -*- encoding: utf-8 -*-
      2 
----> 3 from .display_manager import get_display_manager
        global display_manager = undefined
        global get_display_manager = undefined
      4 from .pretty_print import pretty_print
      5 
      6 

/usr/lib/python2.7/dist-packages/sage/repl/rich_output/display_manager.py in <module>()
     24     The Sage display manager using the doctest backend
     25 """
     26 
     27 #*****************************************************************************
     28 #       Copyright (C) 2015 Volker Braun <vbraun.name@gmail.com>
     29 #
     30 #  Distributed under the terms of the GNU General Public License (GPL)
     31 #  as published by the Free Software Foundation; either version 2 of
     32 #  the License, or (at your option) any later version.
     33 #                  http://www.gnu.org/licenses/
     34 #*****************************************************************************
     35 
     36 
     37 import warnings
     38 
---> 39 from sage.structure.sage_object import SageObject
        global sage.structure.sage_object = undefined
        global SageObject = undefined
     40 from sage.repl.rich_output.output_basic import (
     41     OutputPlainText, OutputAsciiArt, OutputUnicodeArt, OutputLatex,
     42 )
     43 from sage.repl.rich_output.preferences import DisplayPreferences
     44 
     45 
     46 class DisplayException(Exception):
     47     """
     48     Base exception for all rich output-related exceptions.
     49 
     50     EXAMPLES::
     51 
     52         sage: from sage.repl.rich_output.display_manager import DisplayException
     53         sage: raise DisplayException('foo')
     54         Traceback (most recent call last):

ImportError: No module named sage_object

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History of session input: