Python

Today's content:1.hash Module2.xml Module3.configparser Module4.sheve Module5.shutil ModuleKnowledge Point one: hashWhat is a hash:Hash is an algorithm, the algorithm accepts the incoming content, after the operation to get a string of hash if the

Choice of Word breaker tool:Now for Chinese participle, word breaker has many kinds, such as: Jieba participle, thulac, SNOWNLP and so on. In this document, the author uses the Jieba participle, and based on the PYTHON3 environment, the choice of

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1 #-*-coding:utf-8-*-2 ImportConfigparser3 #Configparser Module4 5 #1. Create a Create object6 #2. Create a configuration item dictionary that creates a key-value pair7 #3. Create files to write configuration entries8 9Config =Configparser.

1 #!/usr/bin/env python2 #Coding:utf-83 4 " "There are four numbers: 1, 2, 3, 4, how many three digits can be made up of each other without repeating numbers? What's the number? " "5n = 16num = [4, 2, 3, 1]7List_num = [I * + j * + K] forIinchNum

1 #Cryptographic Modules2 ImportHashlib3 4 #MD5 encryption MD55 #1. Initialize the MD5 module to generate the MD5 object6 #2. Introduce the data update to be encrypted7 #3. Get the encrypted value Hexdigest8m =hashlib.md5 ()9M.update ('Hello World'.

Today's content:Knowledge Point one: RegularWhat is a regular:is to use a series of characters with special meanings to form a set of rules that are used to describe a character string.The regular is used to remove a small string of rules in a large

One, subprocess and commonly used encapsulation functionsWhen we run Python, we are all creating and running a process. Like the Linux process, a process can fork a child process and let the child process exec another program. In Python, we fork a

Knowledge to be mastered:1. Functions2. File processing3, the use of tag4, the decoupling of the programDemand:1: Query2: Add3: Delete4: Modify5: ExitHaproxy.conf Configuration file Contents: 1 Global 2 log 127.0.0.1 local2 3 daemon 4 maxconn 5 log 1

The open function of Python opens the file, but an error occurs when you open the file under Windowsf = open ("E:\python_learn\test.txt", "R"F.read ()The error is as followsThe path is clearly correct, why the error has become 2 \ \Search for some,

Let me briefly introduce the two commonly used data structures, series and daraframe in Python, which are defined by the Pandas module. The series is similar to dict in Python, but is structured, and dataframe is similar to a table in a

moved from QQ space 2014-08-08backgroundPerhaps the title is not clear enough to achieve what function, the following detailed introduction. Because the Windows System task bar date only year, month, day, for me, occasionally want to see the lunar

1. Please use the Linux system command to count the Number of establish status links? Netstat-an |grep established |wc-l-a (All) Show all options, listen related -t (TCP) show only tcp related options -u (UDP) show only udp related

ImportThreading fromSocketserverImportThreadingtcpserver,baserequesthandlerImportSYSImportLoggingformat='% (asctime) s% (threadname) d% (thread) d% (message) s'Logging.basicconfig ( level=logging.info,format=FORMAT)classChathandler

1. File processing=open(file="file01.txt", mode="r", encoding="utf-8"#python3默认编码格式为utf-8= f.read()print(data)print(type# f.close()If an error#UnicodeDecodeError: ‘utf-8‘ codec can‘t decode byte 0xcc in position 0: invalid continuation byteThe

1. Download the installation package　　Choose version executable, depending on your computer's operating system, choose whether it is 32-bit or 64.python3.6-64 bit Downloadpython3.6-32 bit Download2. Install PythonAfter the download is like

Built-in methods:1. ABS () #取绝对值;>>> ABS (-11)11>>> ABS (11)112. All #非0即真 to ensure that all elements are true;>>> all ([0,-5, 3])False>>> all ([1,-5, 3])True3. Any #非0即真 to ensure that an element is true;>>> any ([0,-5, 3])True>>> any ([1,-5,

because the MD5 module was removed in the Python3MD5 operation with Hashlib module in Python3Import Hashlibm=hashlib.md5 () #创建MD5对象passwd= ' aaa123 ' #待加密密码m.update (Passwd.encode ()) #不能直接对字符串加密, first convert the string to bytes typeprint

First, the process branch 1. Single branch: Example 1: Establish a judgment, enter age, determine whether the age is greater than 23, if greater than 23, print the result: ' It is time to find a bf ':1 age_of _you=int (Input ('please input your name:

Brief introduction　　This project login registration verification is to learn the prior learning point of deepening learning, the project's knowledge points have functions, judgment statements, circular statements, file operations.Project Flow　　After