This repo contains my implementations for some standard Data Structures and Algorithms and problems from various websites like geeks for geeks, hackerrank, codeforces..
This is a good link https://www.bigocheatsheet.com/ go through it for time and space complexities of many data structures and algorithms
This is one more link which describes about time complexities and special modules for data structures in python https://wiki.python.org/moin/TimeComplexity