UnboundLocalError: local variable 'dxy' referenced before assignment

[bernatp3rs]

Hi,

I am trying to use TOBAC but I always get the same error:
dxy,dt=tobac.get_spacings(Precip)
File "/usr/local/anaconda3/envs/my_env36/lib/python3.6/site-packages/tobac/utils.py", line 450, in get_spacings
return dxy,dt
UnboundLocalError: local variable 'dxy' referenced before assignment

I cannot even run the following example:
https://github.com/climate-processes/tobac/blob/master/examples/Example_OLR_Tracking_model/Example_OLR_Tracking_model.ipynb

Does anybody know why is this happening?

[freemansw1]

Hm, this is a bit of an odd case. I'm not sure why you would be getting this error as I don't see a path for dxy to be undefined. Either dxy is set here:
https://github.com/climate-processes/tobac/blob/d97517c3fd5af99defbb9fa5a9b924db37f6500d/tobac/utils.py#L436
or it is set here:
https://github.com/climate-processes/tobac/blob/d97517c3fd5af99defbb9fa5a9b924db37f6500d/tobac/utils.py#L438
and if neither if statement is triggered, a ValueError should be raised. What version of tobac are you using?

[JuliaKukulies]

I realized that there is a typo (missing raise before ValueError in tobac/utils.py ) both in the old and newer versions, so that the ValueError would not be raised if the coordinates are not properly defined (see #5). I will fix this in tobac/utils/general.py for v2.0-dev.

[freemansw1]

Great catch by Julia!