upstream/ipython Files · IPython/nbformat/v1/nbjson.py

inputhook: disable CTRL+C when a hook is active....

inputhook: disable CTRL+C when a hook is active. On systems with 'readline', it's very likely to intercept a signal during a select() call. The default SIGINT handler will schedule a KeyboardInterrupt exception to be raised as soon as possible. If ctypes is used to install a Python callback for PyOS_InputHook, this will happen as soon as the bytecode execution starts, so even if the first instruction of the callback is a `try: ... except KeyboardInterrupt` clause, it's actually too late. As ctypes doesn't allow a Python callback to raise an exception, this ends up with IPython detecting an internal error... not pretty. We must therefore ignore the SIGINT signals until we are sure the exception handler is active, in the Python callback.

Brian E. Granger - - Load All Authors

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             nbjson.py
        
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      """Read and write notebooks in JSON 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

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

      from base64 import encodestring

      from .rwbase import NotebookReader, NotebookWriter

      from .nbbase import from_dict

      import json

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

      # Code

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

      class JSONReader(NotebookReader):

          def reads(self, s, **kwargs):

              nb = json.loads(s, **kwargs)

              return self.to_notebook(nb, **kwargs)

          def to_notebook(self, d, **kwargs):

              """Convert from a raw JSON dict to a nested NotebookNode structure."""

              return from_dict(d)

      class JSONWriter(NotebookWriter):

          def writes(self, nb, **kwargs):

              kwargs['indent'] = 4

              return json.dumps(nb, **kwargs)

      _reader = JSONReader()

      _writer = JSONWriter()

      reads = _reader.reads

      read = _reader.read

      to_notebook = _reader.to_notebook

      write = _writer.write

      writes = _writer.writes

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				"""Read and write notebooks in JSON 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
				#-----------------------------------------------------------------------------

				from base64 import encodestring
				from .rwbase import NotebookReader, NotebookWriter
				from .nbbase import from_dict
				import json

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

				class JSONReader(NotebookReader):

				def reads(self, s, **kwargs):
				nb = json.loads(s, **kwargs)
				return self.to_notebook(nb, **kwargs)

				def to_notebook(self, d, **kwargs):
				"""Convert from a raw JSON dict to a nested NotebookNode structure."""
				return from_dict(d)


				class JSONWriter(NotebookWriter):

				def writes(self, nb, **kwargs):
				kwargs['indent'] = 4
				return json.dumps(nb, **kwargs)


				_reader = JSONReader()
				_writer = JSONWriter()

				reads = _reader.reads
				read = _reader.read
				to_notebook = _reader.to_notebook
				write = _writer.write
				writes = _writer.writes