Python Decorators Tutorial: how Python decorators work

Veröffentlicht am: 31 Januar 2019
auf dem Kanal: Red Eyed Coder Club

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This Python Decorators Tutorial video is about what are decorators in Python and how Python decorators work. The video is for absolute beginners with simple examples.

I started with creating a background for a Python decorator usage, and specified the problems that decorators solve.

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In this video reviewed three versions of Python decorators:
1. A simple decorator for a function that not accepting any arguments
2. A decorator for a function that accepting some arguments
3. A decorator that has own arguments for a function that accepting some arguments

And a small bonus:
A small demo that list comprehensions are faster than a FOR loop for generating lists.

Python Decorators are possible because of Python functions are first class objects.
First class object means that:
functions are real objects that even have own methods
a function can be assigned as a value to variables
a function can be sent to another function as an argument (like it happens with the map() function)
we can return function objects as a returning value of another function
inside a function we can define another... nested function.

Timecodes:
7:57 - the beginning of explanation.
12:35 - Python decorators for function with arguments
18:48 - Python decorators with arguments for function that have own argument

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This Python decorators tutorial is about how decorators work in Python.

Python Decorators Tutorial: how Python decorators work:
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