A Pythonic Object
Sample code for Chapter 11 of Fluent Python 2e by Luciano Ramalho (O’Reilly, 2020)
The memtest.py script takes a module name in the command
line and loads it. Assuming the module defines a class named
Vector, memtest.py creates a list with 10 million
instances, reporting the memory usage before and after the list is
created.