checking if there are numbers in the string

[Sp00f]

>>> x='test'
>>> x==x.isdigit()
False
>>> x==x.isalpha()
False
>>> x.isalpha()
True
>>> y='123'
>>> y.isdigit()
True

i was thinking i understand that part of it.. but how would i execute it in my particular code?

for some reason it just skips to the end, and prints "??"