!README.md

lessons learned reviewing old code:

Unit tests are paramount

Unit tests would have picked up some of these issues. For future scripts, start with unit tests. Take a subset of the real data by creating a testing shapefile, then clip all the data to that file, eg,

if testing:
    for layer in input_layers:
      Clip_analysis (in_features, clip_features, out_feature_class, {cluster_tolerance})

input data format should be checked

Parse csv files to make sure they as expected. Check the class of fields to see that they are as expected.

lint the code

put code blocks into variable

This will keep folds working and increase readability.