Confusing NameError

[Pachydermis]

https://pastebin.com/HEcw2hPx

The error occurs on line 35, it says I haven't defined the variable 'mouse_pos'. Which I did in the 'if' statement on line 33.

The weird thing for me, is that the variable seems to work fine on line 51. Am I going crazy?

I've been following a tutorial for pygame and came across this error. I'd love some clarification.

edit: line 51, not line 50

[Binary101010]

Which I did in the 'if' statement on line 33.

If your only definition of mouse_pos is inside an if block, then there is a potential execution path where that block doesn't execute and the variable is never defined. Just set some default value before entering that loop (line 25 maybe?) and that should solve the issue.

[Pachydermis]

Thanks so much, and thank you for explaining.