Python Closure Implementation Counter method

This article mainly introduced the Python closure implementation counter method, analyzed the closure concept and realizes the counter the related skill, needs the friend to be possible to refer to under

This example describes the Python closure implementation counter method. Share to everyone for your reference. The implementation methods are as follows:

First look at the professional explanation: Closure (Closure) is a lexical closure (lexical Closure) abbreviation, is a reference to the function of the free variable. The referenced free variable will exist with this function, even if it has left the environment that created it. So, there is another saying that closures are entities that are combined by functions and reference environments associated with them.

The code is as follows:

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#!/usr/bin/env python #coding =utf-8 def generate_counter (): CNT = [0] def add_one (): cnt[0] = cnt[0] + 1 return cnt[0] ret Urn Add_one counter = generate_counter () print counter () # 1 Print counter () # 2 Print counter () # 3

I hope this article will help you with your Python programming.