XOR
xor(a, b) # Same as a ^ b.
char <-> int
i = ord (c) c = chr(i)
def dec2hex(n): # n is integer! return "%X" % n def hex2dec(s): # s is string! return int(s, 16) print dec2hex(255) # FF print hex2dec('FF') # 255 print hex(255) # 0xff print hex2dec('0xff') # 255