import os
import struct
def random_1():
return (int.from_bytes(os.urandom(7), 'big') >> 3) * 2 ** -53
def random_2():
return (int.from_bytes(os.urandom(7), 'big') >> 3) / (1 << 53)
def random_3():
array = bytearray(b'\x3F' + os.urandom(7))
array[1] |= 0xF0
return struct.unpack('>d', array)[0] - 1