When the my_function() function is called, you'll see the output from the print() function in the terminal, followed by the return value. The return value, 2, is then saved to the variable my_function ...

When a program runs, the basic I/O (input/output) functions are print, raw_input (), and input (). print One of the most useful tools available in Python is the print function.

Use Python lists to store data in one-dimensional rows, access them by indexes, and sort them any which way you like.

lru_cache basics To memoize a function in Python, we can use a utility supplied in Python’s standard library—the functools.lru_cache decorator. lru_cache isn’t hard to use.