Handle use-before-assign warnings from pylint (#340)
* Handle use-before-assign warnings from pylint
* fix remaining flake8, pylint errors
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Co-authored-by: Matthias Diener <mdiener@illinois.edu>
* Handle use-before-assign warnings from pylint
* fix remaining flake8, pylint errors
---------
Co-authored-by: Matthias Diener <mdiener@illinois.edu>