[Python-checkins] r69281 - python/branches/py3k/Lib/importlib/_bootstrap.py
brett.cannon
python-checkins at python.org
Thu Feb 5 03:52:18 CET 2009
Author: brett.cannon
Date: Thu Feb 5 03:52:18 2009
New Revision: 69281
Log:
Rename importlib._bootstrap.SysPathFinder to PathFinder and expose off of
importlib.machinery. Also make the methods either class or staticmethods.
Modified:
python/branches/py3k/Lib/importlib/_bootstrap.py
Modified: python/branches/py3k/Lib/importlib/_bootstrap.py
==============================================================================
--- python/branches/py3k/Lib/importlib/_bootstrap.py (original)
+++ python/branches/py3k/Lib/importlib/_bootstrap.py Thu Feb 5 03:52:18 2009
@@ -589,33 +589,29 @@
super(PyFileImporter, self).__init__(path_entry)
-class SysPathFinder:
+class PathFinder:
"""Meta path finder for sys.(path|path_hooks|path_importer_cache)."""
- def _default_hook(self, path):
- """Use the default hook on 'path'.
-
- If the path will not work for the default hook then raise ImportError.
-
- """
- # TODO(brett.cannon) Implement
- raise ImportError
+ _default_hook = staticmethod(chaining_fs_path_hook(ExtensionFileImporter,
+ PyFileImporter))
# The list of implicit hooks cannot be a class attribute because of
# bootstrapping issues for accessing imp.
- def _implicit_hooks(self, path):
+ @classmethod
+ def _implicit_hooks(cls):
"""Return a list of the implicit path hooks."""
return [self._default_hook, imp.NullImporter]
- def _path_hooks(self, path):
+ @classmethod
+ def _path_hooks(cls, path):
"""Search sys.path_hooks for a finder for 'path'.
Guaranteed to return a finder for the path as NullImporter is the
default importer for any path that does not have an explicit finder.
"""
- for hook in sys.path_hooks + self._implicit_hooks():
+ for hook in sys.path_hooks + cls._implicit_hooks():
try:
return hook(path)
except ImportError:
@@ -625,7 +621,8 @@
raise SystemError("no hook could find an importer for "
"{0}".format(path))
- def _path_importer_cache(self, path):
+ @classmethod
+ def _path_importer_cache(cls, path):
"""Get the finder for the path from sys.path_importer_cache.
If the path is not in the cache, find the appropriate finder and cache
@@ -638,24 +635,25 @@
"""
try:
- finder = sys.path_importer_cache(path);
+ finder = sys.path_importer_cache[path]
except KeyError:
- finder = self._path_hooks(path)
+ finder = cls._path_hooks(path)
sys.path_importer_cache[path] = finder
else:
if finder is None:
# Raises ImportError on failure.
- finder = self._default_hook(path)
+ finder = cls._default_hook(path)
sys.path_importer_cache[path] = finder
return finder
- def find_module(self, fullname, path=None):
+ @classmethod
+ def find_module(cls, fullname, path=None):
"""Find the module on sys.path or 'path'."""
if not path:
path = sys.path
for entry in path:
try:
- finder = self._path_importer_cache(entry)
+ finder = cls._path_importer_cache(entry)
except ImportError:
continue
loader = finder.find_module(fullname)
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