Python

"" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "", "" "". "" "" "" "" "" "" "" "," "" "" "," "" "" "," "" "," "" ">> Colorful Scatter chart .py>> Author: Liu Yang>> e-mail: [email protected]>> blog: Www.cnblogs.com/liu66blog "" ". "" "" "" "" "" ""

First analyze the Web page, find the Academic Office login Verification CodeThen use Python to download the verification code directly to the local (the entire program through the Requests library implementation):def GetRandCode(): =r‘http://jwxt.

First, the use of the collectionA collection is an unordered, non-repeating combination of data, and its main functions are as follows: Go to the weight, turn a list into a set, and then automatically go heavy. Relationship test, test

There are three main Python garbage collection mechanisms, the first is to use reference counting to track and recycle garbage, in order to solve the loopReferring to the problem, the use of the tag-clear method, the tag-purge method brings

Dictionary features: Dict disorder Key is the only, natural to go heavy To create a dictionary:Way1: Careful list pit1 __author__="Kuankuan"2D = Dict.fromkeys ([1, 2, 3], ["name"," Age"])3 Print("Dictionary:", D)4 5D[1][0] ="mmph

Attention1. Cannot open the process indefinitely, cannot infinite the threadThe most common is the open process pool, the thread pool. Where the callback function is very importantThe callback function can actually be used as a programming idea, who

Hashlib ModuleHashlib provides common digest algorithms such as MD5 and SHA1, and so on.So what is a digest algorithm? Abstract algorithm is also called hash algorithm, hashing algorithm. It uses a function to convert any length of data into a fixed

I. Errors and anomaliesErrors are unavoidable in the program, and there are two types of errors1. Syntax error: (this error, the syntax of the Python interpreter can not be detected, must be corrected before the program executes)2. Logic Error:

I. Introduction of cookies and sessionCookies are not part of the HTTP protocol, and because the HTTP protocol is not able to maintain state, we need to "keep state" in reality, so cookies are born in such a scenario.A cookie works by creating

Import OS module is required when using OS modules OS.GETCWD () module functions Function: Gets the current working directory, that is, the directory path of the current Python script work "no parameter" How to use:os.getcwd () Format such as: a =

#!/usr/local/bin/python#--Coding:utf-8--author:jackytime:14-2-22 pm 11:48desc: Python code invocation example for SMS HTTP interface * *Import HttplibImport Urllib#服务地址Host = "Sms.253.com"#端口号Port = 80#版本号Version = "v1.1"#查账户信息的URIBalance_get_uri = "

In the PY application there are many numbers in the results of the operation, it is inevitable that the division (such as unit conversion, etc.), but the integer after the operation will only return an integer, the general results need to be

One, configuration fileUnlike Django, Django will provide us with a configured setting file, and the configuration we need can be automatically added to the setting file, but flask is not, it's an interface that provides us with a variety of

Python basics-condition judgment and python basics judgment 　　Python version: 3.6.2 Operating System: Windows Author: SmallWZQ So far, the programs in the basic Python series are executed in a single statement sequence. In this chapter, I will focus

Python MysqlDb module installation and Usage Details, pythonmysqldb Python uses the mysqldb module to call mysql databases. 1. Install the driver Currently, there are two MySQL drivers. You can choose one of them for installation: 1. MySQL-python: a

Python crawler get and post methods and cookie functions, pythoncookie First, determine the form submission method of the target website you want to crawl. You can see it through the developer tools. Chrome is recommended here. Here, I use email 163

Python Object-oriented Inheritance code explanation, python object-oriented explanation This article focuses on the Inheritance of Python object-oriented, as detailed below. Python inheritance That is, a derived class inherits the fields and methods

The usage and meaning of python @ property are fully parsed, and @ property is fully parsed. The code that you first came into contact with python is to take the length and width of the rectangle, define a rectangle class, set the length and width

Numpy usage tips: array filtering instance code, numpy usage tips This article focuses on the array filtering related to numpy usage techniques, as detailed below. When Boolean array B is used as the subscript to access elements in array x, all

Python example code for XML file parsing, pythonxml 1. XML Introduction XML (eXtensible Markup Language) is an eXtensible Markup Language designed to transmit and store data. It has become the core of many new technologies and has different