如何计算给定字符串中的所有字母、数字和特殊符号？

Question

looking for sum of letters, digits and symbols separately.

def find_digits_chars_symbols(a):
    letters = 0
    digits = 0
    symbols = 0
    for i in a:
        if "A"<=i <= "z" :
            letters += 1

        elif "0"<=i <= "9":
            digits +=1

        else:
            symbol += 1
            
    print("Letters=",letters)
    print("Digits=",digits)
    print("Symbols=",symbols)

getting blank output

Answer 1

You can use the python standard string module in combination with the sum function to count the number of occurences.

import string

def find_digits_chars_symbols(a):
    letters = sum((ch in string.ascii_lowercase+string.ascii_uppercase) for ch in a)
    digits = sum((ch in string.digits) for ch in a)
    symbols = sum((ch in string.punctuation) for ch in a)
    print("Letters=",letters)
    print("Digits=",digits)
    print("Symbols=",symbols)