upstream/ipython Files · IPython/utils/syspathcontext.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

File last commit:

r2252:3ddcb2dc


                r2403:08d6ac78

Download file

             syspathcontext.py
        
                    67 lines
            
             | 1.8 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / IPython / utils / syspathcontext.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      #!/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

      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

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				#!/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

				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