# pcj # 1、打开文件， # 2、打开另外一个新文件，查找内容，替换，写入新文件 f=open("houze","r",encoding="utf-8") f_new=open("houze_new","w",encoding="utf-8") for line in f:     if "我不想这样活着" in line:         line=line.replace("我不想这样活着","我不想这样活着，加油，兄弟")   #.replace("old","new")     f_new.write(line) f.close() f_new.close()

with语句。当忘记关闭文件时，程序结束后自动关闭

with open("houze_new","w",encoding="utf-8") as f: 　　for line in f: 　　print(line)