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Here's the fix we're applying in pyrun to make -m imports work at least for top-level modules:
--- /home/lemburg/orig/Python-2.7.3/Lib/pkgutil.py 2012年04月10日 01:07:30.000000000 +0200
+++ pkgutil.py 2012年09月24日 22:53:30.982526065 +0200
@@ -273,10 +273,21 @@ class ImpLoader:
 def is_package(self, fullname):
 fullname = self._fix_name(fullname)
 return self.etc[2]==imp.PKG_DIRECTORY
 def get_code(self, fullname=None):
+ if self.code is not None:
+ return self.code
+ fullname = self._fix_name(fullname)
+ mod_type = self.etc[2]
+ if mod_type == imp.PY_FROZEN:
+ self.code = imp.get_frozen_object(fullname)
+ return self.code
+ else:
+ return self._get_code(fullname)
+
+ def _get_code(self, fullname=None):
 fullname = self._fix_name(fullname)
 if self.code is None:
 mod_type = self.etc[2]
 if mod_type==imp.PY_SOURCE:
 source = self.get_source(fullname)
This makes runpy work for top-level frozen modules, but it's really only partial solution, since pkgutil would need to get such support in more places.
We also found that for some reason, runpy/pkgutil does not work for frozen package imports, e.g. wsgiref.util. The reasons for this appear to be deeper than just in the pkgutil module. We don't have a solution for this yet. It is also not clear whether the problem still exists in Python 3.x. The __path__ attribute of frozen modules was changed in 3.0 to be a list like for all other modules, however, applying that change to 2.x lets runpy/pkgutil fail altogether (not even the above fix works anymore).