Python统计字符串中的中英文字符、数字空格，特殊字符

# -*- coding:utf8 -*-
import string
from collections import namedtuple

def str_count(s):
    '''找出字符串中的中英文、空格、数字、标点符号个数'''
    count_en = count_dg = count_sp = count_zh = count_pu = 0

    s_len = len(s)
    for c in s:
        # 英文
        if c in string.ascii_letters:
            count_en += 1
        # 数字
        elif c.isdigit():
            count_dg += 1
        # 空格
        elif c.isspace():
            count_sp += 1
        # 中文
        elif c.isalpha():
            count_zh += 1
        # 特殊字符
        else:
            count_pu += 1

    total_chars = count_zh + count_en + count_sp + count_dg + count_pu
    if total_chars == s_len:
        return namedtuple('Count&