Pandas is a powerful python library for data manipulation. It requires limited query level optimisation as its functions can perform rapid data manipulation and analysis on the entire data set. Below is a good introductory tutorial and cheat sheet to get started with pandas. https://pandas.pydata.org/pandas-docs/stable/getting_started/10min.html#min
Pandas for Data Wrangling – tutorial, cheat sheet
Very good article for using pandas.