1、先引入一个os模块，具体代码为：import os
3、用with方式打开文件，打开传入过来的文件名称，模式为只读，编码为UTF-8with open(f_name,mo颊俄岿髭de="r",encoding="UTF-8") as f1,\ open(f_name+"_副本",mode="w",encoding="UTF-8") as f2:这里的副本是用来做替换使用的
5、在for循环中把老内容换成新内容，具体代码如下：line= line.replace(old,new)f2.write(line)
7、接下来我们调用整个函数，并且测试效果，具体代艨位雅剖码如下：func("u_info",媪青怍牙"jack","haha")我们发现文件内容已经被替换成了haha
8、整体代码总结：import osdef func (f_name,old,new): with open(f_name,mode="r",encoding="UTF-8") as f1,\ open(f_name+"_副本",mode="w",encoding="UTF-8") as f2: for line in f1: line= line.replace(old,new) f2.write(line) os.remove(f_name) os.rename(f_name+"_副本",f_name)