Can anyone fix code?

Question

Idk what's wrong
If I print patient variable, it's ok. But if I print doctor error occurred
https://code.sololearn.com/cp6wfA34Z63u/?ref=app

Answer 1

The variables you declared in line 2,3,4 and 22,23 are class variables; they are like static variables in other languages.
You can simply remove those lines as they don't do what you think they do :P

All the variable declaring should be happening in the initialize method. If you declare @schedule in initialize, it'll all work.