code: def convert_id36_to_numeric_id(id36):
      
      if not isinstance(id36, six.string_types) or id36.count("_") > 0:
          raise ValueError("must supply base36 string, not fullname (e.g. use "
                           "xxxxx, not t3_xxxxx)")
      return int(id36, 36)
docs: Convert strings representing base36 numbers into an integer.