import binascii
import time


def change(s, i): #Fucntion for changing 0s to 1s, and 1s to 0s.
    if s == "1":
        a[i] = "0"
        return

    if s == "0":
        a[i] = "1"
        return


b = open("C:/Users/pol/Desktop/test.exe", "rb") #Open up file.
a = b.read(-1) #Read its data, which is given to us in hex.
b.close()
b = open("C:/Users/pol/Desktop/testCloneReversed.exe", "wb") #Open up another file where we'll be writing

a = bin(int(binascii.hexlify(a), 16))[2:]#From hex to a raw binary string.
a = list(a)

print(a[:8]) #['1', '0', '0', '1', '1', '0', '1', '0']
print("Len of a before reverse: " + str(len(a)))

i = 0
for s in a: #Change all 0s to 1s, and all 1s to 0s.
    change(s, i)
    i = i + 1

print(a[:8]) #['0', '1', '1', '0', '0', '1', '0', '1']This works nicely.
print("Len of a after reverse: " + str(len(a)))

a = ''.join(a) #From list to str.

a = hex(int(a, 2))[2:] #From raw binary to hex.
print("Number or bytes * 4 = " + str(len(a) * 4)) #We gain a bit.


print(a[:3]) #0x32, which is 00110010, as you can see it's wrong.
a = binascii.unhexlify(a) #From hexlified to unhexlfied.
b.write(a)

type(a) #Bytes
print(a[:2]) #b'2\xa5'
#2a = 00101010
#2a5 = 001010100101
#a5 = 10100101
print(a[:4]) #b'2\xa5o\xff' Not sure how to read this.

b.close()

####TEST
print("TEST")
a = bin(128) #0x80 in hex.
print(a) #0b10000000, or 0x80 in hex or 128 in decimal.
a = hex(int(a, 2))[2:]
print(a) #Prints 0x80, which is 10000000 in binary and is right.


######################## OUTPUT

['1', '0', '0', '1', '1', '0', '1', '0']
Len of a before reverse: 428767
['0', '1', '1', '0', '0', '1', '0', '1']
Len of a after reverse: 428767
Number or bytes * 4 = 428768
32a
b'2\xa5'
b'2\xa5o\xff'
TEST
0b10000000
80