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import struct
buffer = struct.pack("5s", 'hello', )
buffer = struct.pack("HH" , 1, len(buffer)) + buffer // H ¶ÔÓ¦unsigned short£¬2¸ö×Ö½Ú£¬16λ
print repr(buffer)
print struct.unpack("H", buffer[:2])[0]
print struct.unpack("H", buffer[2:4])[0]
print repr(struct.unpack("5s", buffer[4:])[0])
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