Working with files in Python is pretty easy. But there’s a common mistake that can sneak into your code. Not closing the file ...

Any function involving math operations, especially in Python, tends to be expensive. Caching and reusing the results is often orders of magnitude faster than recomputing the results each time.

The dictionary functions in a similar fashion to the Python list, in that it is a collection of data. In this case, however, dictionaries hold key-value pairs instead of single values.

Getting started is relatively simple, got to love Python! You will create a class in just the same way you create a function, except you will use “class” instead of “def.” ...