upstream/ipython Files · IPython/utils/version.py

Merge pull request from takluyver/import-performance...

Merge pull request 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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      # 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

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				# 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