ti.csv
pandas dataset for practice and understanding

- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

thanks, but no thanks, see https://pandas.pydata.org/pandas-docs/stable/development/contributing.html for how to contribute