python 读文件，跳过有问题的那行

报错：
UnicodeDecodeError: 'gbk' codec can't decode byte 0xfa in position 4781: illegal multibyte sequence

解决方案：
f = open("20091012134152.txt", encoding="gbk", mode="r")
改成
f = open("20091012134152.txt", encoding="gbk", mode="r", errors="ignore")