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

Move object inspection machinery out of the magics code....

Move object inspection machinery out of the magics code. Later we'll put this into a standalone object, but the least intrusive change for now is to put it in the main interactive shell object. At least now it's not embedded in the magics code, and we can start using this programatically via the messaging api.

Brian Granger - - Load All Authors

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             syspathcontext.py
        
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      #!/usr/bin/env python

      # encoding: utf-8

      """

      Context managers for adding things to sys.path temporarily.

      Authors:

      * Brian Granger

      """

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

      #  Copyright (C) 2008-2009  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 sys

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

      # Code

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

      class appended_to_syspath(object):

          """A context for appending a directory to sys.path for a second."""

          def __init__(self, dir):

              self.dir = dir

          def __enter__(self):

              if self.dir not in sys.path:

                  sys.path.append(self.dir)

                  self.added = True

              else:

                  self.added = False

          def __exit__(self, type, value, traceback):

              if self.added:

                  try:

                      sys.path.remove(self.dir)

                  except ValueError:

                      pass

              # Returning False causes any exceptions to be re-raised.

              return False

      class prepended_to_syspath(object):

          """A context for prepending a directory to sys.path for a second."""

          def __init__(self, dir):

              self.dir = dir

          def __enter__(self):

              if self.dir not in sys.path:

                  sys.path.insert(0,self.dir)

                  self.added = True

              else:

                  self.added = False

          def __exit__(self, type, value, traceback):

              if self.added:

                  try:

                      sys.path.remove(self.dir)

                  except ValueError:

                      pass

              # Returning False causes any exceptions to be re-raised.

              return False

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				#!/usr/bin/env python
				# encoding: utf-8
				"""
				Context managers for adding things to sys.path temporarily.

				Authors:

				* Brian Granger
				"""

				#-----------------------------------------------------------------------------
				# Copyright (C) 2008-2009 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 sys

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

				class appended_to_syspath(object):
				"""A context for appending a directory to sys.path for a second."""

				def __init__(self, dir):
				self.dir = dir

				def __enter__(self):
				if self.dir not in sys.path:
				sys.path.append(self.dir)
				self.added = True
				else:
				self.added = False

				def __exit__(self, type, value, traceback):
				if self.added:
				try:
				sys.path.remove(self.dir)
				except ValueError:
				pass
				# Returning False causes any exceptions to be re-raised.
				return False

				class prepended_to_syspath(object):
				"""A context for prepending a directory to sys.path for a second."""

				def __init__(self, dir):
				self.dir = dir

				def __enter__(self):
				if self.dir not in sys.path:
				sys.path.insert(0,self.dir)
				self.added = True
				else:
				self.added = False

				def __exit__(self, type, value, traceback):
				if self.added:
				try:
				sys.path.remove(self.dir)
				except ValueError:
				pass
				# Returning False causes any exceptions to be re-raised.
				return False