83     def _read_extended_value(cls, data, value):  argument
85             return ord(data.read(1)) + 13
87             data.read(1)
88             return ord(data.read(1)) + 269
93     def from_bytes(cls, data):  argument
94         initial_byte = ord(data.read(1))
99         delta = cls._read_extended_value(data, delta)
100         length = cls._read_extended_value(data, length)
127     def parse(self, data, message_info):  argument
131         while data.tell() < len(data.getvalue()):
132             option_header = CoapOptionHeader.from_bytes(data)
137             value = data.read(option_header.length)
392     def _parse_initial_byte(self, data, message_info):  argument
393         initial_byte = ord(data.read(1))
401     def parse(self, data, message_info):  argument
402         version, _type, token_length = self._parse_initial_byte(data, message_info)
404         code = CoapCode(ord(data.read(1)))
405         message_id = struct.unpack(">H", data.read(2))[0]
406         token = data.read(token_length)
408         options = self._options_factory.parse(data, message_info)
421             data.read(),