Python

Used to generate a sequence of numeric types, and range is an immutable type. No support for in-situ changesRange within the specified scopeAccess in the same way as ListT in Range1 an element inside rangeT in Range1 an element is not within

Let's take a list of elements of a string as an example, and delete the elements:>>> l = [‘no surfing‘, ‘flippers‘] 1 Law One: Remove (val)>>> l.remove(‘no surfing‘)>>> l[‘flippers‘] 1 2 3 (1) The

Source of information fetching:http://www.tianqi.com/( weather net )mail server (send): 126 mailboxMail server (receive): QQ mailboxThe code is as follows:#!/usr/bin/env python# -*- coding:utf-8 -*- import smtplibimport urllib, urllib2import re#

In this document I have documented the process of deploying the Flask Web site in Ubuntu, which includes user creation, code acquisition, installation of the PYTHON3 environment, virtual environment settings, Uwsgi startup program settings, and

Classes (Class) and instances (Instance)Defining a class is through the Class keyword:Class Student (object):PassClass name is followed by classes, i.e. studentfollowed by (object), indicating which class the class inherits from.Create an instance

numeric types and String typesThe 1.bin () function converts decimal into a binaryThe 2.OCT () function converts decimal into octalThe 3.hex () function converts decimal into hexadecimalHexadecimal representation: 0-9 a B c d E F4. Characteristics

Tag: ISP 1.0 cannot connect decimal usr sel delete style ber Update content: 1. Add entry bar default IP and port port 2. Fixed Exit function 3. Add Exit Auto Close window function 4. Optimize CPU display as fixed reserved

Python-based Web application Development Learning Summary Project address?? This study is based on the flask framework. Develop a personal blogging system based on tutorials. Blog interface.The whole learning process has gained a lot, the following

1. What storage engines does MySQL have, and what are the ways to optimize MySQL databases? MySQL-supported storage engines have myisam,innodb,memory,csv,archive to create indexes, use composite indexes, use short indexes, do not operate on

Logging module for writing log filesThere are 5 levels, debug (), info (), warning (), error (), and Critical (), the highest level is critical ()Debug () debug mode, info () is the normal information, warning () is warning, error () is wrong,

1, what is programming? Why do you want to program?A: Programming is a verb, programming is equivalent to writing code, then write code for what? That is why programming, it must be to let the computer to help us do things, the code is the computer

Reference: https://www.cnblogs.com/banana201/p/4928733.html# # Bubble Sort Method (Bubblesort) # #The so-called ordering method, that is, a set of unordered sequence order (from large to small, or small to large), then what is called bubble sorting

Mutable objects and immutable objects All objects in Python. There is no so-called value-passing call in Python, all passing is a reference to the object, or it can be considered as a pass-through.In Python, objects are divided into

Object-Oriented Programming: encapsulate the functions you wrote previously into a classClass: When defining a class, the first letter of the class name is capitalized, and the class must be instantiated first.Constructor: When the class is

# Sometimes you may want to visit a foreign site to download materials or tools, there may be a variety of problems, such as Google's human computer verification can not display, the site can not open, etc., it is recommended to use a FQ

File operationsX=open ('/etc/hosts ') # # #默认读的方式打开X.readline ()X.read ()X.seek (0)Y=open ('/root/new.txt ', ' W ')Y.writelines (' abcd\n ')Y.flush () SaveY.close ()Functiondef function name (x,y=11):CommandFunction name (' Tom ', ' Jerry

Sesame HTTP: Ajax result extraction and sesame ajax result Extraction Taking Weibo as an example, we use Python to simulate these Ajax requests and crawl the Weibo posts I sent.1. Analyze the request Open the XHR filter of Ajax and keep sliding the

Sesame HTTP: Selenium + Chrome proxy, seleniumchrome Weibo login limit the number of errors · a large number of accounts with cookies should be removed from the Cookie pool. · proxy is required. · What is the special feature of rogue Baidu for more

Python learning-extract palm and some palm prints using opencv-python, The last time we successfully trained the palm reader http://www.cnblogs.com/take-fetter/p/8438747.html, we can get the recognition result. Next, we need to use opencv to obtain

Example of how django restricts access and redirection by anonymous users, while django Anonymous Users Preface We should have met that in some pages, we do not want anonymous users to access them, such as personal pages. Such pages can only be