Error "vk" is not defined, what should I do?

Question

Python

I ran the script both in PyCharm and in the console, but I get the error "vk" is not defined.

Answer 1

Your vk variable declaration is commented out on line 4.

Answer 2

Since not defined means not defined, and you need to define it.
PS. You would at least go over the code with your eyes before asking.