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c t d }t j d|| }t j d|| }| | k rt d dS )ah Verify that a given **binary** MAC (computed by another party)
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mac_tag (byte string/byte string/memoryview): the expected MAC of the message.
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msg (bytes/bytearray/memoryview):
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It is equivalent to an early call to :meth:`HMAC.update`.
digestmod (module):
The hash to use to implement the HMAC.
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