upstream/ipython Files · IPython/core/tests/test_page.py

Python vs IPython: recommend %cd, %env over !cd, !export...

Python vs IPython: recommend %cd, %env over !cd, !export The quick overview mentioned `!cd DIR` among examples of shell commands one might use —but that doesn't work as user would hope (can only affect commands in same ! e.g. `!cd /; pwd`). That's not as bad now that `!cd` prints a warning, but IMHO better to provide the right mental model up front. => Replaced that with minimal motivation why `!cd` and `!export` can't work, recommending some %magic alternatives; moved it out of examples to not distract, and right before Magics section.

Matthias BUSSONNIER - - Load All Authors

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

      #  Copyright (C) 2010-2011 The IPython Development Team.

      #

      #  Distributed under the terms of the BSD License.

      #

      #  The full license is in the file COPYING.txt, distributed with this software.

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

      import io

      # N.B. For the test suite, page.page is overridden (see IPython.testing.globalipapp)

      from IPython.core import page

      def test_detect_screen_size():

          """Simple smoketest for page._detect_screen_size."""

          try:

              page._detect_screen_size(True, 25)

          except (TypeError, io.UnsupportedOperation):

              # This can happen in the test suite, because stdout may not have a

              # fileno.

              pass

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				#-----------------------------------------------------------------------------
				# Copyright (C) 2010-2011 The IPython Development Team.
				#
				# Distributed under the terms of the BSD License.
				#
				# The full license is in the file COPYING.txt, distributed with this software.
				#-----------------------------------------------------------------------------
				import io

				# N.B. For the test suite, page.page is overridden (see IPython.testing.globalipapp)
				from IPython.core import page

				def test_detect_screen_size():
				"""Simple smoketest for page._detect_screen_size."""
				try:
				page._detect_screen_size(True, 25)
				except (TypeError, io.UnsupportedOperation):
				# This can happen in the test suite, because stdout may not have a
				# fileno.
				pass