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

Prevent qtconsole frontend freeze on lots of output....

Prevent qtconsole frontend freeze on lots of output. The output from the kernel is now clipped to last `buffer_size` before displaying and a timer is used to flush the pending output text instead of attempting to display text on every stream output from kernel. The timer interval is adjusted based on actual time taken to append a screenful of text to widget. This throttles the widget repaints and avoids choking the Qt event loop leaving time to handle other Qt events. Test cases: In [1]: for i in xrange(1000000): print i In [2]: range(100000) Without this commit the first input causes the qtconsole frontend to freeze, not responding to `Ctrl+C`.

Fernando Perez - - Load All Authors

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             importstring.py
        
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             / IPython / utils / 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])