pyimod02_archive.py 文件源码

def extract(self, name):
        """
        Get the object corresponding to name, or None.
        For use with imputil ArchiveImporter, object is a python code object.
        'name' is the name as specified in an 'import name'.
        'import a.b' will become:
        extract('a') (return None because 'a' is not a code object)
        extract('a.__init__') (return a code object)
        extract('a.b') (return a code object)
        Default implementation:
          self.toc is a dict
          self.toc[name] is pos
          self.lib has the code object marshal-ed at pos
        """
        ispkg, pos = self.toc.get(name, (0, None))
        if pos is None:
            return None
        with self.lib:
            self.lib.seek(self.start + pos)
            # use marshal.loads() sind load() arg must be a file object
            obj = marshal.loads(self.lib.read())
        return ispkg, obj

    ########################################################################
    # Informational methods