Pull request

I could achieve this using the nargs parameter for click arguments so we don't break the API Let me know if you'd rather use options

Closes #3 (closed)

Please confirm that this pull request has done the following:

Tests added
Documentation added (where applicable)
Example added (either to an existing notebook or as a new notebook, where applicable)
Description in CHANGELOG.rst added

Edited Aug 25, 2020 by Zebedee Nicholls