py2.py 文件源码

def get_or_create_module(self, fullname):
        """
            Given a name and a path it will return a module instance
            if found.
            When the module could not be found it will raise ImportError
        """
        LOGGER.info('Loading module {0}'.format(fullname))
        parent, _, module_name = fullname.rpartition('.')
        if fullname in modules:
            LOGGER.info('Found cache entry for {0}'.format(fullname))
            return modules[fullname]

        module = modules.setdefault(fullname, imp.new_module(fullname))
        if len(fullname.strip('.')) > 3:
            absolute_from_root = fullname.split('.', 3)[-1]
            modules.setdefault(absolute_from_root, module)
        if len(fullname.split('.')) == 4:
            # add the root of the project
            modules[fullname.split('.')[-1]] = module
        # required by PEP 302
        module.__file__ = self.get_filename(fullname)
        LOGGER.info('Created module {0} with fullname {1}'.format(self.get_filename(fullname), fullname))
        module.__name__ = fullname
        module.__loader__ = self
        module.__path__ = self.path
        if self.is_package(fullname):
            module.__path__ = self.path
            module.__package__ = fullname
        else:
            module.__package__ = fullname.rpartition('.')[0]

        LOGGER.debug('loading file {0}'.format(self.get_filename(fullname)))
        source = self.get_source(fullname)
        try:
            exec(source, module.__dict__)
        except Exception as ex:
            ipdb.set_trace()
        return module