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

Simplify StreamCapturer for subprocess testing...

Simplify StreamCapturer for subprocess testing Rather than using a transient pipe for each subprocess started, the StreamCapturer now makes a single pipe, and subprocesses redirect their output to it. So long as this works on Windows (I've done brief testing, and os.pipe() seems to be functional), this will hopefully make this much more robust. The recent failures in ShiningPanda on IPython.parallel have been caused by StreamCapturer.

Fernando Perez - - Load All Authors

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             importstring.py
        
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      # encoding: utf-8

      """

      A simple utility to import something by its string name.

      Authors:

      * 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.

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

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

      # Functions and classes

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

      def import_item(name):

          """Import and return ``bar`` given the string ``foo.bar``.

          Calling ``bar = import_item("foo.bar")`` is the functional equivalent of

          executing the code ``from foo import bar``.

          Parameters

          ----------

          name : string

            The fully qualified name of the module/package being imported.

          Returns

          -------

          mod : module object

             The module that was imported.

          """

          parts = name.rsplit('.', 1)

          if len(parts) == 2:

              # called with 'foo.bar....'

              package, obj = parts

              module = __import__(package, fromlist=[obj])

              try:

                  pak = module.__dict__[obj]

              except KeyError:

                  raise ImportError('No module named %s' % obj)

              return pak

          else:

              # called with un-dotted string

              return __import__(parts[0])

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				# encoding: utf-8
				"""
				A simple utility to import something by its string name.

				Authors:

				* 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.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Functions and classes
				#-----------------------------------------------------------------------------

				def import_item(name):
				"""Import and return ``bar`` given the string ``foo.bar``.

				Calling ``bar = import_item("foo.bar")`` is the functional equivalent of
				executing the code ``from foo import bar``.

				Parameters
				----------
				name : string
				The fully qualified name of the module/package being imported.

				Returns
				-------
				mod : module object
				The module that was imported.
				"""

				parts = name.rsplit('.', 1)
				if len(parts) == 2:
				# called with 'foo.bar....'
				package, obj = parts
				module = __import__(package, fromlist=[obj])
				try:
				pak = module.__dict__[obj]
				except KeyError:
				raise ImportError('No module named %s' % obj)
				return pak
				else:
				# called with un-dotted string
				return __import__(parts[0])