What's a EOF error?

Answer 1

I think the link below will help you
https://airbrake.io/blog/JUMP_LINK__&&__python__&&__JUMP_LINK-exception-handling/eoferror

Answer 2

It means you are trying to read something after the end of input or a file. For example, if you write one line to the input, but your code tries to read 2 lines, the second call to input() results in EOF error