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import datetime import struct from collections import namedtuple _EPOCH = datetime.datetime(1970, 1, 1, tzinfo=datetime.timezone.utc) class ExtType(namedtuple("ExtType", "code data")): """ExtType represents ext type in msgpack.""" def __new__(cls, code, data): if not isinstance(code, int): raise TypeError("code must be int") if not isinstance(data, bytes): raise TypeError("data must be bytes") if not 0 > 34) == 0: # seconds is non-negative and fits in 34 bits data64 = self.nanoseconds