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Merge pull request #2868 from takluyver/import-performance...
Merge pull request #2868 from takluyver/import-performance Import performance Defer various imports for a small reduction in startup time. IPython.lib.__init__ previously loaded IPython.lib.inputhook to export some of its functions. This meant that importing anything from IPython.lib also loaded inputhook. For now, I've just removed that import, but that is an API change, because the functions are no longer accessible as e.g. IPython.lib.enable_qt4 Added a note about the API change. Timing command, borrowed from Openoffice to simulate cold start: $ sync ; echo 3 | sudo tee /proc/sys/vm/drop_caches; time ipython3 -c pass Results with this branch: 7.68, 7.64, 7.35, 7.38 s 'real' Results with master: 8.17, 8.04, 7.81, 7.77

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nosepatch.py
76 lines | 2.8 KiB | text/x-python | PythonLexer
"""Monkeypatch nose to accept any callable as a method.
By default, nose's ismethod() fails for static methods.
Once this is fixed in upstream nose we can disable it.
Notes:
- As of Nose 1.0.0, the problem persists so this monkeypatch is still
needed.
- Merely importing this module causes the monkeypatch to be applied."""
#-----------------------------------------------------------------------------
# Copyright (C) 2009-2011 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
#-----------------------------------------------------------------------------
import unittest
import sys
import nose.loader
from inspect import ismethod, isfunction
#-----------------------------------------------------------------------------
# Classes and functions
#-----------------------------------------------------------------------------
def getTestCaseNames(self, testCaseClass):
"""Override to select with selector, unless
config.getTestCaseNamesCompat is True
"""
if self.config.getTestCaseNamesCompat:
return unittest.TestLoader.getTestCaseNames(self, testCaseClass)
def wanted(attr, cls=testCaseClass, sel=self.selector):
item = getattr(cls, attr, None)
# MONKEYPATCH: replace this:
#if not ismethod(item):
# return False
# return sel.wantMethod(item)
# With:
if ismethod(item):
return sel.wantMethod(item)
# static method or something. If this is a static method, we
# can't get the class information, and we have to treat it
# as a function. Thus, we will miss things like class
# attributes for test selection
if isfunction(item):
return sel.wantFunction(item)
return False
# END MONKEYPATCH
cases = filter(wanted, dir(testCaseClass))
for base in testCaseClass.__bases__:
for case in self.getTestCaseNames(base):
if case not in cases:
cases.append(case)
# add runTest if nothing else picked
if not cases and hasattr(testCaseClass, 'runTest'):
cases = ['runTest']
if self.sortTestMethodsUsing:
cases.sort(self.sortTestMethodsUsing)
return cases
##########################################################################
# Apply monkeypatch here
# Python 3 must be running with newer version of Nose, so don't touch anything.
if sys.version_info[0] < 3:
nose.loader.TestLoader.getTestCaseNames = getTestCaseNames
##########################################################################