错误是基于10的int（）的无效文字：。这只是意味着您传递给 int 的参数看起来不像数字。换句话说，它是空的，或者除了数字之外还有一个字符。

The error is "invalid literal for int() with base 10:". This just means that the argument that you passed to int doesn't look like a number. In other words it's either empty, or has a character in it other than a digit.

这可以在python shell中重现。

This can be reproduced in a python shell.

>>> int("x")
ValueError: invalid literal for int() with base 10: 'x'