upstream/ipython Files · IPython/nbformat/v1/nbbase.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`.

Brian E. Granger - - Load All Authors

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                r11519:c7a90e39

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             nbbase.py
        
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      """The basic dict based notebook format.

      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.

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

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

      # Imports

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

      import pprint

      import uuid

      from IPython.utils.ipstruct import Struct

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

      # Code

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

      class NotebookNode(Struct):

          pass

      def from_dict(d):

          if isinstance(d, dict):

              newd = NotebookNode()

              for k,v in d.items():

                  newd[k] = from_dict(v)

              return newd

          elif isinstance(d, (tuple, list)):

              return [from_dict(i) for i in d]

          else:

              return d

      def new_code_cell(code=None, prompt_number=None):

          """Create a new code cell with input and output"""

          cell = NotebookNode()

          cell.cell_type = u'code'

          if code is not None:

              cell.code = unicode(code)

          if prompt_number is not None:

              cell.prompt_number = int(prompt_number)

          return cell

      def new_text_cell(text=None):

          """Create a new text cell."""

          cell = NotebookNode()

          if text is not None:

              cell.text = unicode(text)

          cell.cell_type = u'text'

          return cell

      def new_notebook(cells=None):

          """Create a notebook by name, id and a list of worksheets."""

          nb = NotebookNode()

          if cells is not None:

              nb.cells = cells

          else:

              nb.cells = []

          return nb

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				"""The basic dict based notebook format.

				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.
				#-----------------------------------------------------------------------------

				#-----------------------------------------------------------------------------
				# Imports
				#-----------------------------------------------------------------------------

				import pprint
				import uuid

				from IPython.utils.ipstruct import Struct

				#-----------------------------------------------------------------------------
				# Code
				#-----------------------------------------------------------------------------

				class NotebookNode(Struct):
				pass


				def from_dict(d):
				if isinstance(d, dict):
				newd = NotebookNode()
				for k,v in d.items():
				newd[k] = from_dict(v)
				return newd
				elif isinstance(d, (tuple, list)):
				return [from_dict(i) for i in d]
				else:
				return d


				def new_code_cell(code=None, prompt_number=None):
				"""Create a new code cell with input and output"""
				cell = NotebookNode()
				cell.cell_type = u'code'
				if code is not None:
				cell.code = unicode(code)
				if prompt_number is not None:
				cell.prompt_number = int(prompt_number)
				return cell


				def new_text_cell(text=None):
				"""Create a new text cell."""
				cell = NotebookNode()
				if text is not None:
				cell.text = unicode(text)
				cell.cell_type = u'text'
				return cell


				def new_notebook(cells=None):
				"""Create a notebook by name, id and a list of worksheets."""
				nb = NotebookNode()
				if cells is not None:
				nb.cells = cells
				else:
				nb.cells = []
				return nb