Useful Functions

• itertools - chain, permutation, combinations, product, takewhile, dropwhile
• functools - lru_cache
• collections - deque, defaultdict, OrderedDict, Counter
• heap - heapify

Tricks

• float(“inf”) - largest floating point number
• inbuilt iter function iterates through the list and forgets the previous elements when used in conditionals
• any is an inbuilt function
• extend vs append in python list
• python -X faulthandler for when python is unable to give proper error for system faults