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Backport PR #2738: Unicode content crashes the pager (console)...
Backport PR #2738: 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`?

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__init__.py
41 lines | 1.5 KiB | text/x-python | PythonLexer
"""Implementation of all the magic functions built into IPython.
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2012 The IPython Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from ..magic import Magics, magics_class
from .auto import AutoMagics
from .basic import BasicMagics
from .code import CodeMagics, MacroToEdit
from .config import ConfigMagics
from .deprecated import DeprecatedMagics
from .execution import ExecutionMagics
from .extension import ExtensionMagics
from .history import HistoryMagics
from .logging import LoggingMagics
from .namespace import NamespaceMagics
from .osm import OSMagics
from .pylab import PylabMagics
from .script import ScriptMagics
#-----------------------------------------------------------------------------
# Magic implementation classes
#-----------------------------------------------------------------------------
@magics_class
class UserMagics(Magics):
"""Placeholder for user-defined magics to be added at runtime.
All magics are eventually merged into a single namespace at runtime, but we
use this class to isolate the magics defined dynamically by the user into
their own class.
"""