Раз и навсегда. Как автоматизировать построение когорт с Python и Pandas

https://medium.com/@adrianovalexey/%D1%80%D0%B0%D0%B7-%D0%B8-%D0%BD%D0%B0%D0%B2%D1%81%D0%B5%D0%B3%D0%B4%D0%B0-%D0%BA%D0%B0%D0%BA-%D0%B0%D0%B2%D1%82%D0%BE%D0%BC%D0%B0%D1%82%D0%B8%D0%B7%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D1%82%D1%8C-%D0%BF%D0%BE%D1%81%D1%82%D1%80%D0%BE%D0%B5%D0%BD%D0%B8%D0%B5-%D0%BA%D0%BE%D0%B3%D0%BE%D1%80%D1%82-%D1%81-python-%D0%B8-pandas-74f2c38dd3f7