upstream/ipython Files · IPython/core/fakemodule.py

Move crash handling to the application level and simplify class structure....

Move crash handling to the application level and simplify class structure. Starting to try to take real advantage of the refactoring, to have generic crash handling. This also lets us initialize the app without needing all the self.attempt() wrappers, since now there's a good system-wide crash handler at the app level (not inside the shell instance). I didn't yet remove the attempt() method because we may have occasional uses for it (we still do, but in one place only). I also removed some extra class layers that weren't quite needed. Creating classes solely for the purpose of passing parameters makes the code (IMO) harder to understand, I kept getting lost in parts of the class hierarchy. I think these changes provide the same flexibility but with easier to follow code (less things to remember, basically). What I tried to do was to use argument passing instead of inheritance for all cases I saw where the inheritance wasn't really adding new functionality. In some cases, this actually allowed me to remove methods that were effectively duplicated in the subclasses.

Brian Granger - - Load All Authors

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      # -*- coding: utf-8 -*-

      """

      Class which mimics a module.

      Needed to allow pickle to correctly resolve namespaces during IPython

      sessions.

      """

      #*****************************************************************************

      #       Copyright (C) 2002-2004 Fernando Perez. <fperez@colorado.edu>

      #

      #  Distributed under the terms of the BSD License.  The full license is in

      #  the file COPYING, distributed as part of this software.

      #*****************************************************************************

      import types

      def init_fakemod_dict(fm,adict=None):

          """Initialize a FakeModule instance __dict__.

          Kept as a standalone function and not a method so the FakeModule API can

          remain basically empty.

          This should be considered for private IPython use, used in managing

          namespaces for %run.

          Parameters

          ----------

          fm : FakeModule instance

          adict : dict, optional

          """

          dct = {}

          # It seems pydoc (and perhaps others) needs any module instance to

          # implement a __nonzero__ method, so we add it if missing:

          dct.setdefault('__nonzero__',lambda : True)

          dct.setdefault('__file__',__file__)

          if adict is not None:

              dct.update(adict)

          # Hard assignment of the object's __dict__.  This is nasty but deliberate.

          fm.__dict__.clear()

          fm.__dict__.update(dct)

      class FakeModule(types.ModuleType):

          """Simple class with attribute access to fake a module.

          This is not meant to replace a module, but to allow inserting a fake

          module in sys.modules so that systems which rely on run-time module

          importing (like shelve and pickle) work correctly in interactive IPython

          sessions.

          Do NOT use this code for anything other than this IPython private hack."""

          def __init__(self,adict=None):

              # tmp to force __dict__ instance creation, else self.__dict__ fails

              self.__iptmp = None

              # cleanup our temp trick

              del self.__iptmp

              # Now, initialize the actual data in the instance dict.

              init_fakemod_dict(self,adict)

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				# -- coding: utf-8 --
				"""
				Class which mimics a module.

				Needed to allow pickle to correctly resolve namespaces during IPython
				sessions.
				"""

				#*****************************************************************************
				# Copyright (C) 2002-2004 Fernando Perez. <fperez@colorado.edu>
				#
				# Distributed under the terms of the BSD License. The full license is in
				# the file COPYING, distributed as part of this software.
				#*****************************************************************************

				import types

				def init_fakemod_dict(fm,adict=None):
				"""Initialize a FakeModule instance __dict__.

				Kept as a standalone function and not a method so the FakeModule API can
				remain basically empty.

				This should be considered for private IPython use, used in managing
				namespaces for %run.

				Parameters
				----------

				fm : FakeModule instance

				adict : dict, optional
				"""

				dct = {}
				# It seems pydoc (and perhaps others) needs any module instance to
				# implement a __nonzero__ method, so we add it if missing:
				dct.setdefault('__nonzero__',lambda : True)
				dct.setdefault('__file__',__file__)

				if adict is not None:
				dct.update(adict)

				# Hard assignment of the object's __dict__. This is nasty but deliberate.
				fm.__dict__.clear()
				fm.__dict__.update(dct)


				class FakeModule(types.ModuleType):
				"""Simple class with attribute access to fake a module.

				This is not meant to replace a module, but to allow inserting a fake
				module in sys.modules so that systems which rely on run-time module
				importing (like shelve and pickle) work correctly in interactive IPython
				sessions.

				Do NOT use this code for anything other than this IPython private hack."""

				def __init__(self,adict=None):

				# tmp to force __dict__ instance creation, else self.__dict__ fails
				self.__iptmp = None
				# cleanup our temp trick
				del self.__iptmp
				# Now, initialize the actual data in the instance dict.
				init_fakemod_dict(self,adict)