python如何实现敏感词替换

# -*- coding: utf-8 -*-import oscurr_dir = os.path.dirname(os.path.abspath(__file__))filtered_words_txt_path = os.path.join(curr_dir,'filtered_words.txt')import chardetdef filter_replace(string):    string = string.decode("gbk")    filtered_words = []    with open(filtered_words_txt_path) as filtered_words_txt:        lines = filtered_words_txt.readlines()        for line in lines:            filtered_words.append(line.strip().decode("gbk"))    print replace(filtered_words, string)def replace(filtered_words,string):    new_string = string    for words in filtered_words:        if words in string:            new_string = string.replace(words,"*"*len(words))    if new_string == string:        return new_string    else:        return replace(filtered_words,new_string)if __name__ == '__main__':    filter_replace(raw_input("Type:"))