upstream/ipython Files · IPython/frontend.py

Avoid calling the input transformer twice in the execution stack....

Avoid calling the input transformer twice in the execution stack. This should allow to register input transformers that have side effects, at least in Notebooks. Right now there are sill multiple calls which may happen in the terminal on execution requests.

Matthias Bussonnier - - Load All Authors

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      """

      Shim to maintain backwards compatibility with old frontend imports.

      We have moved all contents of the old `frontend` subpackage into top-level

      subpackages (`html`, `qt` and `terminal`), and flattened the notebook into

      just `IPython.html`, formerly `IPython.frontend.html.notebook`.

      This will let code that was making `from IPython.frontend...` calls continue

      working, though a warning will be printed.

      """

      # Copyright (c) IPython Development Team.

      # Distributed under the terms of the Modified BSD License.

      import sys

      from warnings import warn

      from IPython.utils.shimmodule import ShimModule, ShimWarning

      warn("The top-level `frontend` package has been deprecated since IPython 1.0. "

           "All its subpackages have been moved to the top `IPython` level.", ShimWarning)

      # Unconditionally insert the shim into sys.modules so that further import calls

      # trigger the custom attribute access above

      sys.modules['IPython.frontend.html.notebook'] = ShimModule(

          src='IPython.frontend.html.notebook', mirror='IPython.html')

      sys.modules['IPython.frontend'] = ShimModule(

          src='IPython.frontend', mirror='IPython')

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				"""
				Shim to maintain backwards compatibility with old frontend imports.

				We have moved all contents of the old `frontend` subpackage into top-level
				subpackages (`html`, `qt` and `terminal`), and flattened the notebook into
				just `IPython.html`, formerly `IPython.frontend.html.notebook`.

				This will let code that was making `from IPython.frontend...` calls continue
				working, though a warning will be printed.
				"""

				# Copyright (c) IPython Development Team.
				# Distributed under the terms of the Modified BSD License.

				import sys
				from warnings import warn

				from IPython.utils.shimmodule import ShimModule, ShimWarning

				warn("The top-level `frontend` package has been deprecated since IPython 1.0. "
				"All its subpackages have been moved to the top `IPython` level.", ShimWarning)

				# Unconditionally insert the shim into sys.modules so that further import calls
				# trigger the custom attribute access above

				sys.modules['IPython.frontend.html.notebook'] = ShimModule(
				src='IPython.frontend.html.notebook', mirror='IPython.html')
				sys.modules['IPython.frontend'] = ShimModule(
				src='IPython.frontend', mirror='IPython')