Create exchange_sort.py (#4600)

* Create exchange_sort.py

added exchange sort

* Fixed doctest in exchange_sort.py

* Fixed formatting error and added new length variable

added empty line at end of exchange_sort.py and turned len(numbers) into a variable

* Fixed formatting errors with black

added empty line

Bonnie committed 4y ago

032999f36ed6eef61752e6bc5e399020988b06bd

Parent: 3c22524

Committed by GitHub <noreply@github.com> on 8/15/2021, 5:43:05 AM