The Pandas library is ideal for analyzing data, data science and machine learning. You can load, prepare, manipulate, merge and model data. It also is great for data visualization.source
The primary data structures in Pandas are series and DataFrame. A series is a “one-dimensional labeled array holding data of any type” while DataFrames are “a two-dimensional data structure that holds data like a two-dimension array or a table with rows and columns” source
After you import the pandas library and assign its alias as pd you can then read whatever file you are trying to load with the built in read and whatever format the file is in. Ex. pd.read_csv('file.csv'). Some common file formats are csv, json and SQL.