hex

def hexx ():
    from random import randrange
    guess = 0
    streak = 0
    multiple = 4
    while guess != 'q':
        if streak == 5 and multiple < 256:
            multiple *= 2
            streak = 0
        answer = randrange(multiple + 1)*(256/multiple)
        print "0x%s" % hex(answer)[2:].upper()
        guess = raw_input("Enter in decimal: ")
        if int(guess) == answer:
            print "\nCorrect\n"
            streak += 1
        else:
            print "\nIncorrect\nit was %s\n" % answer
            streak = 0

def hexstringconvert(hexstring):
    hex_numerals = [str(chr(i)) for i in range(48,58)]
    hex_numerals += [chr(i) for i in range(65,71)]
    hex_numerals += [str(chr(i)) for i in range(97,103)]
    input_string = hexstring
    input_string += ' '
    output_string = ''
    i = 0
    for char in input_string:
        if char in hex_numerals \
                and input_string[i-1] not in hex_numerals:
            output_string += '0x'
        output_string += char
        i += 1
    return output_string

def hexmath():
    hexstring = 0
    while True:
        hexstring = raw_input('\n')
        if hexstring == 'q':
            break
        print str(
                hex(eval(hexstringconvert(hexstring)))
                    )[2:], '=', eval(hexstringconvert(hexstring))