敏感词文本文件 filtered_words.txt，当用户输入敏感词语，则用星号 * 替换，例如当用户输入“北京是个好城市”，则变成“**是个好城市”。
filtered_words.txt：
filtered_words.txt
#-*-coding: utf-8-*-
class Input(object):
def __init__(self):
self.filtered_words = list()
self.in_string = ''
self.out_string = ''
self.load_filtered_words()
def load_filtered_words(self, filename='filtered_words.txt'):
with open(filename, 'r') as file:
for line in file.readlines():
self.filtered_words.append(line.strip())
def filter_words(self):
self.out_string = self.in_string
for word in self.filtered_words:
if word in self.out_string:
self.out_string = self.out_string.replace(word, len(word)*'*')
def user_input(self, filename):
if not filename:
self.in_string = input('>')
else:
with open(filename, 'r') as f:
self.in_string = f.read()
def std_output(self):
self.filter_words()
print(self.out_string)
if __name__ == '__main__':
i = Input()
i.user_input('')
i.std_output()
