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# -*- coding: utf8 -*-

import ctypes

def h2f(s):

cp = ctypes.pointer(ctypes.c_long(s))

fp = ctypes.cast(cp, ctypes.POINTER(ctypes.c_float))

return fp.contents.value

def f2h(s):

fp = ctypes.pointer(ctypes.c_float(s))

cp = ctypes.cast(fp, ctypes.POINTER(ctypes.c_long))

return hex(cp.contents.value)

print(f2h(3.1415))

print(h2f(0x40490e56))







#-------------------




ret = f2h(3.1415) # ret = "0x40490e56"

ret2 = h2f(int(ret,16)) # ret2 = 3.14149999619


ret3 = "%.4f"%ret2 # ret3 = "3.1415"


ret4 = float(ret3) # ret4 = 3.1415