Self learning python for data analysis. Dataframes and designing programs with functions, classes, and modules

I wanted see if folks here could help expedite my efforts to self learn python with the intent of doing data analysis using dataframes and designing programs with functions, classes, and modules. I've had a few classes in the past but never spent much time putting the knowledge into practice. The focus in the course work was not too practical and was pretty academic. Never heard of a dataframe until a coworker pointed them out for example. If there are any resources whether books or what have you, your suggestions are welcome. Thanks for any help in my efforts!