NUMPY- https://python.plainenglish.io/numpy-6e1c1f46e2d8

PANDAS 1- https://python.plainenglish.io/learning-pandas-from-clueless-to-curious-in-one-read-a7c2bb26ac39

PANDAS 2- https://medium.com/@priyeshshah2006/deeper-dive-into-pandas-e95da72ddcad

PANDAS 3- https://medium.com/@priyeshshah2006/ending-pandas-series-446c337b2305