Python 读入文件报错

运行 data = open('input.txt', 'r').read() 的时候一直报错，

Traceback (most recent call last):

File "C:/Users/wang/PycharmProjects/7-6/py2.py", line 2, in <module>

data = open('input.txt', 'r').read()

UnicodeDecodeError: 'gbk' codec can't decode byte 0xff in position 0: illegal multibyte sequence

后来发现是 txt 文档的保存格式不对，