Fix exception causes in 14 modules
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

This covers around half of the project. We could do the rest later. Any idea why some checks are failing? I'm seeing "ImportError: No module named conda.cli" but I don't see how that's related to my PR. > Any idea why some checks are failing? I'm seeing "ImportError: No module named conda.cli" but I don't see how that's related to my PR.

failing CI should be fixed now. can you merge master. thanks @cool-RR 

in theory we could have a code_checks rule that fails if we *don't* have ```from err```, but might be non-trivial to do via bash, maybe a linter could do this? (flake plugin)