python - Get the number of character classes from an argument -

the program takes single string command line argument. should print out number of character classes contained in string, e.g. abn1.

import sys  = sys.argv[1] if a.upper():       = 1 elif a.lower():     = + 1 elif a.digit():     = + 1 else:     = + 1 

i use loop include 4 character classes: digits, lower case characters, upper case characters , special characters, i.e. else.

following zondo's answer, came with:

import sys  s = sys.argv[1] methods = {str.isdigit: 'd', str.isupper: 'u', str.islower: 'l', (lambda c: (not str.isdigit(c) , not str.isupper(c) , not str.islower(c))):'s'} result = set() c in s:     m in methods:         if m(c):             result.add(methods[m]) print(len(result))