что не так?

I would like to give some feedback about ...

From: http://www.checkio.org/mission/house-password/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.130 Safari/537.36

def checkio(data):

digit = False
upper = False
lower = False
if len(data) >= 10:
    for x in data:
        if x in map(chr, range(ord('0'), ord('9'))):
            digit = True
        if x in map(chr, range(ord('A'), ord('Z'))):
            upper = True
        if x in map(chr, range(ord('a'), ord('z'))):
            lower = True
return digit and upper and lower

if name == 'main': #These "asserts" using only for self-checking and not necessary for auto-testing assert checkio(u'A1213pokl') == False, "1st example" assert checkio(u'bAse730onE4') == True, "2nd example" assert checkio(u'asasasasasasasaas') == False, "3rd example" assert checkio(u'QWERTYqwerty') == False, "4th example" assert checkio(u'123456123456') == False, "5th example" assert checkio(u'QwErTy911poqqqq') == True, "6th example"