python float 与 4byte 互转

# -*- coding: utf-8 -*-

__author__ = 'vanxkr.com'

import struct

def byte2float(x):
    return struct.unpack('<f', struct.pack('4b', *x))[0]

def float2byte(f):
    return [hex(i) for i in struct.pack('f', f)]

byte2float([0x00, 0x00, 0x48, 0x42])
50.0

flaot2byte(0.5)
[0x00, 0x00, 0x00, 0x3F]