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Backport PR #8131: handle undefined when sorting quick help...
Backport PR #8131: handle undefined when sorting quick help Since undefined is neither less than nor greater than anything in Javascript, the sort function was treating it as equal to everything, causing inconsistent behavior depending on the sort algorithm of the browser. closes #8089 This ensures undefined elements are sorted last in the sequence.

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version.py
36 lines | 1.2 KiB | text/x-python | PythonLexer
# encoding: utf-8
"""
Utilities for version comparison
It is a bit ridiculous that we need these.
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2013 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
#-----------------------------------------------------------------------------
from distutils.version import LooseVersion
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
def check_version(v, check):
"""check version string v >= check
If dev/prerelease tags result in TypeError for string-number comparison,
it is assumed that the dependency is satisfied.
Users on dev branches are responsible for keeping their own packages up to date.
"""
try:
return LooseVersion(v) >= LooseVersion(check)
except TypeError:
return True