def __CastNop(self, values):
    if len(values) != 1:
      self.__CastError(values, 'nop', 'requires one and only one value')
    else:
      return values[0]
Return values[0] if it exists -- default for most where clauses.
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/gql/__init__.py/GQL.__CastNop