从文本文件打印随机行时出错

我的代码是:

import random
with open('Long films') as f:
    lines = f.readlines()
    print(random.choice(lines))

但它打印了这个错误:

Traceback (most recent call last):
line 3, in <module>
    lines = f.readlines()
line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 36: ordinal not in range(128)

为了避免这个错误,我需要做什么?