Update csv reads

[mschwamb]

update csv reads for a change to pandas

fixes #792

• Does pip install still work?
• Do all the units tests run successfully?
• Have you used black on the files you have updated to confirm python programming style guide enforcement?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (71734ac) 75.98% compared to head (d71fedf) 75.98%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #794   +/-   ##
=======================================
  Coverage   75.98%   75.98%           
=======================================
  Files          65       65           
  Lines        2944     2944           
=======================================
  Hits         2237     2237           
  Misses        707      707           

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