def _get_module(self, module_name, version):
    if not module_name:
      module_name = appinfo.DEFAULT_MODULE
    if module_name not in self._module_name_to_module:
      raise request_info.ModuleDoesNotExistError()
    if (version is not None and
        version != self._module_configurations[module_name].major_version):
      raise request_info.VersionDoesNotExistError()
    return self._module_name_to_module[module_name]
sub-classes to define
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/tools/devappserver2/dispatcher.py/Dispatcher._get_module--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/core/window.py/_Window._gotitem