python pubsub example

This article mainly introduces the Python generator definition and simple usage, combined with the example form more detailed analysis of the Python generator concept, principles, usage and related operations considerations, the need for friends can refer to the following The examples in this article describe Python b

Install python (https://www.python.org/), download the latest Python version Configure environment variables. (Example), I installed Python under/installation folder with Python 3.5.2. The path set is as follows:d:\installation\python3.5.2;d:\installation\python3.5.2\scrip

This article describes how to use the smtplib module in Python to process emails. it is a basic knowledge in Python beginners. if you need it, you can refer to it in Internet-based applications, programs often need to automatically send emails. For example, the registration system of a website will send an email to confirm registration when the user registers. wh

We all know that the basic usage of else in Python is the if...elif...else in the conditional control statement ..., but else there are two other uses, one for the end of the loop and the other for the error-handling try. This was originally the standard syntax for Python, but because of the different habits of most other programming languages, people intentionally or unintentionally ignored these usages. I

Python slice usage example tutorial, This article describes how to use the slice operation in Python in the form of an example and shares it with you for your reference. The details are as follows: It is very common to retrieve some elements of a list or tuple. For example,

Example of how to use a function (closure) in a Python function. This example describes how to use the Python closure. We will share this with you for your reference. The details are as follows: You can also define functions, that is, closures, in Python functions. Similar t

resaon attribute containing the error code and error message. The following code is used to test the effect; import urllib import urllib2 url = 'http://www.server.com/register.php' user_agent = 'Mozilla/5.0 (Windows NT 6.1; rv:33.0) Gecko/20100101 Firefox/33.0' values = {'useid' : 'user', 'pwd' : '***', 'language' : 'Python' } headers = { 'User-Agent' : user_agent } data = urllib.urlencode(values) req = urllib2.Request(url, data, headers) r

functions are written to test the inheritance and polymorphism of classes in Python#Write a animal class, which has a run methodclassAnimal (object):defRun (self):Print "Animal is running ..."#write a cat and dog class inheriting from the animal classclassCat (Animal):defRun (self):Print "Cat is running ..." defEat (self):Print "Cat is eating ..."classDog (Animal):defRun (self):Print "Dog is running ..." defEat (self):Print "Dog is eating ..."t

As we all know, Python's parallel processing capability is not ideal. I think that if we don't consider the standard parameters of threads and Gil (most of them are legitimate), the reason is not that the technology is not in place, but that we are not using the appropriate method. Most of the textbooks on Python threads and multiple processes are excellent, but the content is tedious. They do have a lot of useful information at the beginning, but oft

The Vim plug-in is a. Vim script file that defines functions, mappings, syntax rules, and commands that you can use to manipulate windows, buffers, and rows. A general plug-in contains the command definition and event hooks. When you write a vim plug-in using Python, the function is written using VIML, although VIML is quick to learn, Python is more flexible, for exampl