Python: Decorators

55mIntermediate2020-07-07

Authors

Jonathan Fernandes

Consultant focusing on data science, AI, and big data

Course details

Decorators are an increasingly important feature in Python. They add functionality to an existing object without permanently modifying it. Being able to use decorators effectively is critical to working with larger Python projects and frameworks. In this course, Jonathan Fernandes explains what decorators are and why they are used so extensively in production projects. He explains how to solve common challenges associated with decorators, such as debugging; how to chain decorators; how to use decorators with classes; and how to access the arguments passed into decorated functions. Plus, find out how to use and debug decorators in the real world by examining decorators' role in the source code for the Flask microplatform.

Topics include:
Working with functions in Python
Beautifying output
HTML styling
Using decorators with arguments
Using decorators with classes
Identifying decorators in Flask source code

Skills covered

PythonProgramming LanguagesOpen SourceSoftware DevelopmentDeep Dive (X:Y)

Concepts

0. Introduction

01 - Decorators in Python

1. Functions

02 - Working with functions in Python
03 - Functions within functions

2. Getting Started

04 - What are decorators
05 - Challenge - Beautify your output
06 - Solution - Beautify your output
07 - Challenges with debugging
08 - Challenge - HTML styling with decorators
09 - Solution - HTML styling with decorators

3. Decorators with Arguments

10 - Functions with args and kwargs
11 - Decorators with args and kwargs
12 - Use decorators to time functions
13 - Challenge - Decorators with arguments
14 - Solution - Decorators with arguments

4. Decorators with Classes

15 - Classes and decorators in Python
16 - Use decorators as a cache

5. Decorators in the Real World

17 - Install Flask
18 - Run Flask
19 - The route function in Flask

Conclusion

20 - Experiment with decorators in Python