python统计文章中单词个数（不包含标点符号）

Question

题目要求如左图，标点符号转换成空格单词个数算不出来，还有不会转换列表，麻烦各位解答！

Answer 1

import copy

a = 'ni de ju zi,nide juzi'
a = a.replace(',', ' ')
print('文章中有{}个单词'.format(len(a.split())))
x_list = input("输入要删除的单词，单词用逗号分隔").split(',')
a_copy = copy.deepcopy(a.split())
for w in a.split():
    if w in x_list:
        a_copy.remove(w)
print(' '.join(a_copy))