Python

I. Sending requests via requestsPreviously used urllib and URLLIB2 analog HTTP request sent, in the actual scenario, we need to create their own defined header, body and so on, using urllib very troublesome, very accidental opportunity to contact

Learn the tools Selenium Python needs:1. Browser2. Python3, SELENIUM4, FireBug (Firefox) 5, Chromedriver, Iedriverserver, Geckodriver6, IDE (pycharm/sublime/eclipse, etc.)first, the browserSelenium support a lot of browsers, then which browser to

Text file: Readfile.txtDetailed Description:Read () #一次性读取文本中全部的内容, returns the result as a stringReadLine () #只读取文本第一行的内容, returns the result as a stringReadLines () #读取文本所有内容 and returns the result in the form of a list, typically with the forCase

[Python] Regular expression (1) Conceptual distinction: Search and match (match) fromReImportSearch, Matchsearch ("Nana","Banana")# Search succeeds!Search"Bana","Banana")# Search succeeds!Match"Nana","Banana")# Match fail, returns

Tag: Indicates return NES entry exit exception by optional parameterOpens file: Open (name[,mode[,buffering]), returns a file object, pattern (mode) and buffer (buffering) are two optional parameters.Suppose there is a file named Somefile.txt, the

1, file operation Flow: Open the file, get the file handle and assign a value to a variable Manipulating a file with a handle Close File The following files:2017-03-24 11:25:06:349-info: [Debug] [androidbootstrap] sending

Syntax for list parsing: [Expr for Iter_var in iterable], which iterates through all entries of the Iterable object. Where expr is applied to each member of the sequence, the final result value is the list that the expression produces, and the

1. Code structure1) NotesSingle-line Comment: #Multiline Comment: "" "" "" """"a=11111Print (a)"""2) Basic Data typeBoolean:true and False (Python-case-sensitive Boolean type)int: integer type (python does not differentiate short,long,int uniformly

Iterators:The For loop can iterate over two types of data:1. such as list, tuple, dict, set, etc.2. Functions with the yield keyword or can be called with __next__ (), which is the generatorThe objects that can be called by for are iterable, and you

#!usr/bin/env python#Coding:utf-8" "Enumerate () Description: 1, enumerate () is a python built-in function, 2, enumerate is literally enumerated, enumerated meaning, 3, for an iterative, can traverse the object (list, tuple, string), enumerate to

Import TurtleImport timeImport MathDef Circle (Bob,r,angle): n = 720 Jiaodu = 360/n Juli=2*r*math.sin (JIAODU/180*MATH.PI/2) Bob.pu () BOB.FD (R) bob.lt (90+JIAODU/2) BOB.PD () For I in Range (angle*n//360): BOB.FD

The socket module is used to create the socket communication service, but it is found that the service created with the socket module cannot be processed in multithreading, and when a large number of request processing is required, the request is

Last encounter this problem want to write down, in fact, I did not very much, the teacher said this thing does not need to understand, only need to memorize, write a lot of remember, so today collected a few articles, plus their own understanding,

Objective:The previous 5 blogs mainly related to the basic knowledge of Python and focus on difficult issues related to the collation, this blog mainly for file operations related knowledge points to do a systematic comb, in order to help everyone

Now I assume your Python is installed in the E:\Python27 directory, set the environment variables as follows:"Python is not an internal or external command"System variables--environment variables---Find path in the system variable, double-click Path,

The role of 1.socketserver:TCP-based sockets, the key is two loops, a link loop, a communication loopThere are two main classes in the Socketserver module: the server class (solve the link problem) and the request class (to solve the communication

1, my environment is windows, need to install notepad++, install Python2, configure environment variables (Baidu can see below)2. Open CMD window----- input I: "Enter the disk on which to store Python code (my I:\pyhtonCode)"------ Enter CD

Installation of python3, Windows and linux, and python3window I. Windows Installation 1. First, install windows. Go to the python website https://www.python.org/downloads/download page and select the region to download. Click Download To go to the

Python context manager and else block, 　　In the end, the context manager may be almost as important as the subroutine itself. At present, we only understand the context manager ...... The Basic language has the with statement, and many languages

Python variables and types, Python variable types1. The program is used to process data, and the variable is used to store data. Number1 = 1002. to make full use of the memory space and manage the memory more efficiently, variables have different