UnboundLocalError: local variable 'boxprops' referenced before assignment

[catskillsresearch]

UnboundLocalError: local variable 'boxprops' referenced before assignment

[mwaskom]

I don’t understand why it is so hard to just show the actual code you are using. Even if your suggested change is correct, we will still want to add a test for the edge case, and that requires understanding the circumstances where it arises.

[mwaskom]

Please provide a reproducible example, thank!

[catskillsresearch]

There is a for loop in the routine in categorical.py. The variable boxprops is set for various cases inside the for loop. It is undefined before the loop and used afterwards. It just doesn't imagine the case where there is no data and the for loop has 0 iterations. Setting boxprops = None before the start of the loop cures the problem.

[mwaskom]

A reproducible example is code that can be copy-pasted in toto to demonstrate the problem. Thanks!

[mwaskom]

https://matthewrocklin.com/minimal-bug-reports

[catskillsresearch]

It is hard to reproduce the exact context. If you add boxprops = None on line 630 of categorical.py, the problem I experienced will not recur. If for any reason self.iter_vars is empty for a given application, this problem will be experienced by other users, without the addition of that line, for the reasons I described above.