__init__.py 文件源码

def filter_datastore_query(self, query, filters=None):
    """Add query filter to restrict to this key range.

    Args:
      query: A datastore.Query instance.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      The input query restricted to this key range.
    """
    assert isinstance(query, datastore.Query)

    if filters:
      for f in filters:
        query.update({"%s %s" % (f[0], f[1]): f[2]})

    if self.include_start:
      start_comparator = ">="
    else:
      start_comparator = ">"
    if self.include_end:
      end_comparator = "<="
    else:
      end_comparator = "<"
    if self.key_start:
      query.update({"__key__ %s" % start_comparator: self.key_start})
    if self.key_end:
      query.update({"__key__ %s" % end_comparator: self.key_end})
    return query