Python

When it comes to design patterns, we have to deal with the idea of modeling, and when it comes to modeling ideas, UML is naturally applied, and there are many tools for open source UML, which are very convenient to use. In recent years, with the

1. PrefaceBecause of the numerous versions of Python, there are also Python2 and Python3 debates, so some packages or third-party libraries are prone to version incompatibility issues.By virtualenv This tool, you can build a series of virtual Python

I. Type and members1. Inspect. GetMembers (object[, predicate]) The second parameter can usually call the following 16 methods as required;Returns a list of all members that have a value of object, in (name,value) pairsInspect.ismodule (object):

I. Definition of exception handlingThe Python interpreter detects an error, triggering an exception (also allowing the programmer to trigger an exception himself)Programmers write specific code that is specifically designed to catch this exception

1. Documentation Basics1. A file is a collection of data stored on external media, the base unit of the file is a byte, and the file contains the number of bytes that are the length of the file. Each byte has a default location, starting at 0, the

Summarize: The default parent thread runs out, and the child threads do not exit immediately, unlike THREAD.START_THREADXXXX The parent thread ran out, and did not quit, and had been there Thread startup is fast and does not cost

At that time, after reading the basic syntax of Python to a friend wrote a dollar probability conversion after the stitching results found that do not know how Python splicing strings to see some of the information they made a summaryThe first is

Installing JiebaPIP3 Install JiebaThe JIEBA supports three types of participle modes:Precise mode: Cut the sentence to the most precise, suitable for text analysisFull mode: All words in the sentence can be scanned out, very fast, but can not solve

One, in HTML | Safe can be processed in the background in the following ways1 " " 2 from Import Mark_safe 3 Text = Mark_safe (text)Second, views.py operation1 fromDjango.shortcutsImportRender2 3 fromDjangoImportForms4

English documentsClass objectReturn a new featureless object. object is a base for all classes. It has the methods is common to all instances of Python classes. This function does the not accept any arguments.Note:object does not has a __dict__, so

1. XML modulesReference reference Source Link: https://www.cnblogs.com/python-gm/p/8032465.html Thank youXML is a protocol that implements data exchange between different languages or programs, similar to JSON, but JSON is simpler to use, but, in

Iterators Iterative (iterable): Directly acting on a For loop variable Iterator (Iterator): Directly acting on the For loop variable, and can be called with Next Identification, availableisinstancle() Generator No for,

https://www.cnblogs.com/zihe/p/6993891.htmlA knowledge reserve for understanding character encoding　　1. How the text editor accesses the file (Nodepad++,pycharm,word)Opening the editor opens a process that is in memory, so content written in the

ObjectiveCurrently the selenium version has been upgraded to 3.0, and most of the online tutorials are based on 2.0, so it is important to understand the version number before learning. This series is still based on SELENIUM3.I. Introduction of

1. Dynamic ParametersParameters are passed normally when the number of arguments is equal to the number of formal parameters.Def func1 (A, B, c): passfunc1 (1, 2, 3)When the number of arguments is not equal to the number of formal parameters, an

Record the interface Automation test platform developed by yourself:　　Interface testing is less costly, relatively stable, and less volatile than UI testing, and routine testing can be done using postman, JMeter, Python request, and more.The

I. Anonymous function lambda1.lambda is just an expression, and the function body is much simpler than def.The body of the 2.LAMBDA is an expression, not a block of code. Can only encapsulate a finite amount of logic in a lambda expression.>>> def

Sockets are also commonly referred to as sockets, which are used to connect to the server client and are a handle to a communication chain, where an application usually makes a request to the network through a socket or answers a network

OPS script: Python for bulk IP port scanningFocus on network operation and maintenance, only send practical dry goodsScan QR code to pay attention to the publicToday do not want to update, send an inventory, share a small piece of Python code to

Make full use of subjective initiative when resources are insufficient. You do not have the root permission for the test machine. To use a Python script to perform a stress test on the database, you can only install it in your own directory.