DOC: Fixing EX01 - Added example
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).

closes https://github.com/pandas-dev/pandas/issues/37875
Nice looks like that was the last one @DeaMariaLeon 🎉  Thank you @mroeschke 🥳