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Functional Python Programming

Functional Python Programming

By : Steven F. Lott
4 (9)
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Functional Python Programming

Functional Python Programming

4 (9)
By: Steven F. Lott

Overview of this book

This book is for developers who want to use Python to write programs that lean heavily on functional programming design patterns. You should be comfortable with Python programming, but no knowledge of functional programming paradigms is needed.
Table of Contents (18 chapters)
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17
Index

Chapter 11. Decorator Design Techniques

Python offers us many ways to create higher-order functions. In Chapter 5, Higher-order Functions, we looked at two techniques: defining a function which accepts a function as an argument and defining a subclass of Callable which is either initialized with a function or called with a function as an argument.

In this chapter, we'll look at using a decorator to build a function based on another function. We'll also look at two functions from the functools module, the update_wrapper() and wraps() functions, that can help us build decorators.

One of the benefits of decorated functions is that we can create composite functions. These are single functions that embody functionality from several sources. A composite function, Decorator Design Techniques, can be somewhat more expressive of a complex algorithm than Decorator Design Techniques. It's often helpful to have a number of syntax alternatives for expressing complex processing.

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