upstream/ipython Files · IPython/deathrow/quitter.py

Backport PR : Unicode content crashes the pager (console)...

Backport PR : Unicode content crashes the pager (console) We've run into an interesting bug in the astropy project. https://github.com/astropy/astropy/issues/600 When displaying a docstring that contains Unicode and is also long enough that it gets sent to the pager it fails since the docstring can't be sent to the pager as ascii. This crashes in the middle of sending content to the pager, so the shell ends up in an inconsistent state and stops echoing the keyboard etc. The fix (attached) is merely to encode the content sent to the pager in the same encoding as the terminal (`sys.stdout.encoding`). Strictly speaking, this isn't always the right thing to do, since the pager may be configured to expect a different encoding than the terminal, but that is sort of an irrational way to configure a machine... ;) For example, `less`, in the absence of any special environment variables to tell it otherwise, uses the standard `LC*` environment variables to determine what to do, which should be the same mechanism the terminal also uses by default. If anyone can suggest a better fix, I'm all for it. Perhaps it should be configurable, defaulting to `sys.stdout.encoding`?

Matthias BUSSONNIER - - Load All Authors

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      # coding: utf-8

      """

      A simple class for quitting IPython.

      Authors

      -------

      * Fernando Perez

      * Brian Granger

      """

      #-----------------------------------------------------------------------------

      #  Copyright (C) 2008-2011  The IPython Development Team

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Imports

      #-----------------------------------------------------------------------------

      #-----------------------------------------------------------------------------

      # Code

      #-----------------------------------------------------------------------------

      class Quitter(object):

          """Simple class to handle exit, similar to Python 2.5's.

          It handles exiting in an ipython-safe manner, which the one in Python 2.5

          doesn't do (obviously, since it doesn't know about ipython)."""

          def __init__(self, shell, name):

              self.shell = shell

              self.name = name

          def __str__(self):

              return 'Type %s() to exit.' % self.name

          def __call__(self):

              self.shell.ask_exit()

          # Repr MUST return a string, else display like pprint hooks get confused

          def __repr__(self):

              self.shell.ask_exit()

              return ''

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				# coding: utf-8
				"""
				A simple class for quitting IPython.

				Authors
				-------
				* Fernando Perez
				* Brian Granger
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2008-2011 The IPython Development Team
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING, distributed as part of this software.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------


				#-----------------------------------------------------------------------------
				# Code
				#-----------------------------------------------------------------------------


				class Quitter(object):
				"""Simple class to handle exit, similar to Python 2.5's.

				It handles exiting in an ipython-safe manner, which the one in Python 2.5
				doesn't do (obviously, since it doesn't know about ipython)."""

				def __init__(self, shell, name):
				self.shell = shell
				self.name = name

				def __str__(self):
				return 'Type %s() to exit.' % self.name

				def __call__(self):
				self.shell.ask_exit()

				# Repr MUST return a string, else display like pprint hooks get confused
				def __repr__(self):
				self.shell.ask_exit()
				return ''