O. Functions
Functions are one of the cornerstones of programming. They provide a way to reuse code. If you’ve ever copy-pasted lines of code just to change a few parameters, then turning those lines of code into a function not only makes your code more readable, but also prevents you from making mistakes later on. Every time code is copy-pasted, it adds another place to look if a correction is needed, and puts that burden on the programmer. When you use a function, you need to make a correction only once, and it will be applied every time the function is called.
I highly suggest the Software-Carpentry Python episode on functions for more details.1
1. http://swcarpentry.github.io/python-novice-inflammation/06-func/
An empty function looks like ...
Get Pandas for Everyone: Python Data Analysis, First Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
