Here is a list of python libraries that are required for data science. The library with it's usage is given below.
Numpy stands for Numerical Python. It is used to work with array in python. We use numpy because it consumes less memory space and also it is very fast in operation of higher order than normal list operation. You can see the python notebook containing various different methods of numpy and also there use in numpy array by clicking here
Pandas is the most useful library used for Data Analysis.