See the representation of a floating point in Python

float_bits.py

import struct

num = 0.5

bits = [[c>>i & 1 for i in range(7, -1, -1)] for c in struct.pack("!d", num)]
bits_flatten = [i for l in bits for i in l]

bits_sign = bits_flatten[0]
bits_exponent = bits_flatten[1:12]
bits_fraction = bits_flatten[12:64]

sign = (-1) ** bits_sign
exponent = sum([b<<i for i, b in enumerate(reversed(bits_exponent))]) - 1023
fraction = 1 + sum([b*(2**(-(i+1))) for i, b in enumerate(bits_fraction)])

print(sign * fraction * (2**exponent))

Reference: https://en.wikipedia.org/wiki/Double-precision_floating-point_format