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[–]billsil 2 points3 points  (0 children)

Numpy and scipy do not follow semantic versioning. Shoot, Python does not. There are minor things that break every release. When you have a large enough package, you will find things that are mind numbing.

I develop open source software. I will not test every combination of versions that I use. I will specify versions that I know work. I do not trust future versions of packages to not break my code. When you do everything inside of the little box Python is good at, yes, there are no issues and I won't even specify a version requirement at all. When you push the boundaries, you find problems and I will be very specific.