Python

1. CentOS7 Install MySQL# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm# RPM-IVH mysql-community-release-el7-5.noarch.rpm# yum Install Mysql-community-serverRestart MySQL Service# Service Mysqld RestartThe initial

Write a record Leetcode brush questions, brush Five easy every day, brush medium after brushing, with Python and C + + do. The first day today, come on!Title Original questionGiven an array of integers, every element appears twice except for one.

Brief introductionLearn to use OPENCV to draw geometry, the main functions are: Cv2.line (), Cv2.circle (), Cv2.rectangle (), Cv2.ellipse (), Cv2.puttext, etc.Specific explanations can be viewed using Help (Cv2.puttext).import numpy as npimport

Introduction: CentOS is currently the most popular Linux server system, its default Python 2.x, but according to the Python community planning, in the near future, the entire community will migrate to Python3, and will not support Python2, how to

Recursive functions of PythonInside a function, you can call other functions. If a function calls itself internally, the function is a recursive function.For example, let's calculate factorial n! = 1 x 2 x 3 x ... x n , which is represented by a

#！ /usr/bin/env python#-*-Coding:utf-8-*-# @Author: Yue Qian# @date: 2018-03-04"""Requirements: Enter user name, password, authentication successful display welcome information, enter the error three times after locking the user.Process:1. Determine

I hope the basics of the previous two Pyhon are a little bit more for newcomers to Python, and then I'll write object-oriented knowledge.First of all, let's say inherit. What is inheritance, the simple point is that the son inherits the property of

Python to traverse files under a folderWhen you read a file, you often need to traverse the folder, and Python's os.path contains many ways to manipulate files and folders. Listed below:Os.path.abspath (Path) #返回绝对路径os. Path.basename (Path) #返回文件名os.

Python3 crack the slider verification code function of geetest (excellent verification), python3geetest The following code describes how to use python to crack the geetest verification code. The specific code is as follows: From selenium import

Python logging package usage summary, pythonlogging 1. Introduction to logging The logging package of Python provides a general log system for third-party modules or applications. This module provides different log levels and records logs in

KNN algorithm example for machine learning using python only, and pythonknn algorithm example The previous article briefly introduced linear regression, logistic regression, Bayesian classification, and simple implementation using python. This

Python configures the project migration and deployment of dependency package information based on the Flask framework, and pythonflask After Coding Based on the Flask framework on the local machine, you need to deploy the code on the specified

Python crawler instance collects 2345 weather forecast, python2345 During the winter vacation, I learned Python crawlers and used the simplest method to obtain the required weather data. Right, no error, the simplest method. There is no function

Keyword-driven small example _ example1, keyword _ example1 This example consists of three parts, which implement data reading from the txt file. Each keyword is mapped to a function. Compute. py is the tested function. #encoding=UTF-8def add(a,b):

Django development basics-database operations, django ---- Operations on the database in Django are performed by Models. What is Models? Generally,A ModelCorresponding databaseOne data table In Django, Models usesClassIn the form It contains

036 thread processes (important) and 036 thread Processes Compared with Java, python is much simpler and can be understood in one example.###########################There are two ways to create a thread. The first method is to directly create a

Python variable, I. What are variables? A variable is a memory object that stores data. The stored content can be dynamically changed. Defining a variable is equivalent to applying for an access space object with an address (variable name) to the

You can also learn Python ---- if and python ---- if Introduction: if the execution process exceeds two branches, the if-elif statement is used. If-elifStatement Structure If condition: Code to be executed Elif judgment conditions: Code to be

Charm python ------ if, Introduction: if-else is used to determine what to do if one condition is met, or else what to do. If-elseStatement syntax structure IfJudgment condition: Code to be executed Else: Code to be executed   Condition: It is

Configure MongoDB in Pycharm and mongodb in pycharm Reprinted from http://www.cnblogs.com/ystwyfe/p/7599509.html  MongoDB plug-in Installation File --> Settings --> Plugins --> Browse repositories --> Mongo --> Install MongoDB