程序：
text = open('test.txt', 'r')
print(text.readlines()[0].strip())
print(text.readlines()[0].strip())
安慰：
Traceback (most recent call last):
File "C:\Users\User\Desktop\test.py", line 3, in <module>
print(text.readlines()[0].strip())
IndexError: list index out of range