Essentially, these are blocks of Python code that only run when required to perform a task. To prevent your program from becoming bulky and slow, calling functions is something you should learn.

This is an awesome bundle and a good way to start coding with Python for less than $20. If you wind up liking it, be sure to check out our roundup of the best Python courses, too.

Python for Trading and Finance The good news is that you don't need a voucher code to access these coding courses for free. You can simply enroll and start learning.