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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def pymmh3_hash128(key: Union[bytes, bytearray], seed: int = 0, x64arch: bool = True) -> int: """ Implements 128bit murmur3 hash, as per ``pymmh3``. Args: key: data to hash seed: seed x64arch: is a 64-bit architecture available? Returns: integer hash """

    if x64arch:
        return pymmh3_hash128_x64(key, seed)
    else:
        return pymmh3_hash128_x86(key, seed)