reload_importer.py
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00001 # Software License Agreement (BSD License)
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00003 # Copyright (c) 2012, Willow Garage, Inc.
00004 # All rights reserved.
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00006 # Redistribution and use in source and binary forms, with or without
00007 # modification, are permitted provided that the following conditions
00008 # are met:
00009 #
00010 #  * Redistributions of source code must retain the above copyright
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00012 #  * Redistributions in binary form must reproduce the above
00013 #    copyright notice, this list of conditions and the following
00014 #    disclaimer in the documentation and/or other materials provided
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00016 #  * Neither the name of Willow Garage, Inc. nor the names of its
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00020 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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00031 # POSSIBILITY OF SUCH DAMAGE.
00032 
00033 import __builtin__
00034 import os
00035 import sys
00036 
00037 
00038 class ReloadImporter:
00039 
00040     """Overrides the builtin import and automatically reloads all modules which are imported from on
00041     of the reload paths after calling enable."""
00042 
00043     def __init__(self):
00044         self._excluded_modules = sys.modules.keys()
00045         self._reload_paths = None
00046         self._import_stack = []
00047         self._reloaded_modules = set()
00048         self._import = __builtin__.__import__
00049 
00050     def enable(self):
00051         __builtin__.__import__ = self._reimport
00052 
00053     def disable(self):
00054         __builtin__.__import__ = self._import
00055 
00056     def add_reload_path(self, path):
00057         if self._reload_paths is None:
00058             self._reload_paths = tuple()
00059         self._reload_paths += (os.path.abspath(path),)
00060 
00061     def _reload(self, module):
00062         if module.__name__ not in self._import_stack and module.__name__ in sys.modules:
00063             if not self._import_stack:
00064                 self._reloaded_modules.clear()
00065             self._import_stack.append(module.__name__)
00066             # force reload
00067             if module.__name__ not in self._reloaded_modules:
00068                 reload(module)
00069                 self._reloaded_modules.add(module.__name__)
00070             self._import_stack.pop()
00071 
00072     def _reimport(self, name, globals_=None, locals_=None, fromlist=None, level=-1):
00073         module = self._import(name, globals_, locals_, fromlist if not None else [], level if not None else -1)
00074 
00075         if module.__name__ not in self._excluded_modules and \
00076             (self._reload_paths is None or \
00077               (hasattr(module, '__file__') and len([p for p in self._reload_paths if module.__file__.startswith(p)]) > 0) \
00078             ):
00079             self._reload(module)
00080 
00081         return module


qt_gui
Author(s): Dirk Thomas
autogenerated on Fri Jan 3 2014 11:44:00