raw = 'asdfaa3fa'
lst = [str.isalnum, str.isalpha, str.isdigit, str.islower, str.isupper]
for f in range(0, 5):
    counter = 0
for i in range(len(raw)):
    if lst[f](raw[i]) == True:
        print(lst[f])
counter = 1
print(True)
break
if counter == 0:
    pass
Looping through list of functions in a function in Python dynamically