python re findall example

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Example analysis of Replace method in Python _python

This article describes the Replace method in Python in the form of an instance, which is very useful, as follows: There are two main types of replace methods: Last_date = "1/2/3" target is "123" Method One: Repalce Date =last_date.replace ('/', ') Method Two: RE p = re.compile ("/") date = P.sub (", last_date) Note that you must not escape, or the function will not take effe

Python psutil module simple use example

Python psutil module simple use example This article mainly introduces the Python psutil module's simple examples. This article provides a script to view cpu information, memory information, system startup time, and network card information, for more information, see Easy to install The Code is as follows: Pip install psutil Official website address: Https://pyth

Example of string replacement in Python

This article mainly introduces the string replacement operation example in Python, including using the string template. template example and a regular expression example. if you need a regular expression, you can refer to the string replacement (interpolation). you can use string. template, you can also use the concate

Python---beautifulsoup simple crawler example

To the Python automation compared to the classmate, many understand some reptile method, some also study very deep, below IA simple reptile example, for your reference. Of course there are many needs can be re-learning, download progress of the displayInstructions, download the completed prompts, and more.First, we have to study the structure of the crawler site,

Python Demo Login Django Project CSRF (with Jumpserver example)

Directory: Config.ini jumpserver.py Config.ini[local_environment]title = 本地测试环境url = http://192.168.100.28/login_url= http://192.168.100.28/users/login/user_url = http://192.168.100.28/users/user/user_list_url= http://192.168.100.28/api/users/v1/users/user_create_url = http://192.168.100.28/users/user/create/username = adminpassword = adminjumpserver.py#!/usr/bin/env python3#-*-coding:utf-8-*-import osimport configparserimport socketimport requestsimport Jsonimport

Python Threading Multithreaded Programming example

There are two ways to implement multithreading in Python: function, Thread Class 1. The function calls the Start_new_thread () function in the thread module to create a thread that tells the thread what to do in the form of a thread function#-*-Coding:utf-8-*-import threaddef F (name): #定义线程函数 print "This is" + name if __name__ = = ' __main__ ': th Read.start_new_thread (F, ("Thread1",)) #用start_new_thread () call thread functions and other parame

A detailed description of the regular expressions in Python (example analysis)

In this article we are going to go into details about Regular ExpressionsAdvanced knowledge, and I'll come up with some of the problems that might arise in Python programming. examples of regular expressions. First advanced point of knowledge: Slicing a string Using regular expressions to slice a string is more flexible than a fixed character, see the normal segmentation code: >>> ' a B c '. Split (') [' A ', ' B ', ', ' ', ' C '] Well, you can't

code example for capturing detailed exception information in Python

In the process of development, you may often encounter a requirement that requires the output of Python's exception information to a log file. Online methods are not very practical, the following is a practical, from the Python 2.7 source code to buckle out. The nonsense does not say directly on the code, the code is not many, the annotation is more than just. Import sys, tracebacktraceback_template = "Traceback (most recent call last): File"% (file

[Machine learning]KNN algorithm Python Implementation (example: digital recognition)

[i]) if (classifierresu Lt! = Datinglabels[i]): ErrOrcount + = 1.0 print "The total error rate is:%f"% (Errorcount/float (numtestvecs)) Print error count def img2vector (filename): Returnvect = zeros ((1,1024)) FR = open ( FileName) For I in range (+): LINESTR = Fr.readline () F or J in range (+): RETURNVECT[0,32*I+J] = Int (linestr[j]) RETURN RET Urnvectdef handwritingclasstest (): hwlabels = [] trainingfilelist = Listdir (' trainingDigits ') #load the training

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