Python

One, the collection:list_1 = [1,4,5,7,3,6,7,9]list_1=Set (list_1) list_2= Set ([2,6,0,66,22,8,4])#intersectionList_1.intersection (list_2)#List_1 & List_2#and setList_1.union (list_2)#list_1 | list_2#Difference SetList_1.difference

In Python set is a collection type of the base data type, which has both a mutable set (set ()) and an immutable set (Frozenset). Creating Set Sets, collection set additions , collection deletions , intersections , sets , and difference sets is a

‘‘‘Fetching data from the Web:WebBrowser: Python comes with, open the browser to get the specified page.Requests: Downloading files and Web pages from the Internet.Beautiful Soup: Parsing HTML, which is the format of Web page writing.Selenium:

The use of lists is described in the article "Python data Types", where the list has a copy () method, meaning that the same list is copied. For example1names = ["Xiao Ming","Little Red","Little Black","Xiao Huang","Small white"]2 #Copy the names,

@ modifierThe ' @ ' symbol used as a function modifier is a new addition to python2.4, and the modifier must appear on the previous line of the function definition and is not allowed on the same line as the function definition. That is to say @a def

Import Copy#浅拷贝person = ["Name", ["Saving", 1000]]P1 = copy.copy (person)P2 = person.copy () #两种都是浅拷贝Print (PERSON,P1,P2) # # #结果为 [' name ', [' saving ', [+]] [' Name ', [' saving ', ' +]] [' Name ', [' saving ', 1000]]Person[0] = "Clark"Print

Tag: Ane time pre Sep name update from LAN share1. Using the Pygame package, use the Python3.5 version2. The results achieved are:A window appears showing a background picture of an enemy aircraft and a plane of his own.Enemy aircraft in the top,

2017-07-25 21:08:16First, the scale of the web crawlerRestriction of web crawler? SOURCE review: Judge User‐agent to limitCheck the user‐agent domain of the incoming HTTP protocol header, only in response to browser or friendly crawler access? Post

#-*-coding:utf-8-*-__author__='Hjianli'#Import reImportOsinfo_message="""Alex 100000Rain 80000Egon 50000Yuan 30000"""#Sequence DictionaryXulie_dict = {}#Salary DictionaryGongzi_dict = {}#locally created file namefile_name ="Info.txt"#path to create

2017-07-25 22:49:21ImportRequestsImportOsurl='https://wallpapers.wallhaven.cc/wallpapers/full/wallhaven-278989.jpg'Root='e://pics//'Path= root + url.split ('/') [-1]defgethtml (URL):#Open Web page is risky, need to use TRY-EXCEPT statement for risk

Although a tuple is a constant object, try to (1, 2, 3) and the (1, [2, 3]) put in dict or set and interpret the results. 650) this.width=650; "Src=" https://s2.51cto.com/wyfs02/M02/9C/F6/wKioL1l4Q5ji4F8JAAB6K_QT1tg428.png-wh_500x0-wm_ 3-wmp_4-s_9756

The difference between Python 2 and Python 3:1. Running python directly, is actually called the Python2, input python3, is actually called Python32. In Python 2, you need to mark Utf-8 's Chinese input characters in advance, #-*-Coding:utf-8-*-or #

#-*-Coding:utf-8-*-Import xlrdImport CodecsDef read_excel ():#save the Resultitem like (Key,value)FW = Codecs.open (' Result.txt ', ' w ', ' Utf-8 ')Workbook = Xlrd.open_workbook (R ' D:\work1\word2vec_noquery_avn_sorted_unique_xiao.xlsx ')# Get all

Before silly do not know there are configparser so convenient module, are a one-to-the-resolution conversion ...Configuration file xxxxx# Notes 1; Note 2[Section1] # nodek1 = v1 # valueK2:v2 # value[Section2] # nodek1 = v1 # valuek2=[' 123 ', ' 456

Job Requirements:Implementing User name Password login verification Determine whether the user name password is correct, print the welcome message correctly, error output specific error cause information Users can enter the password

Definition: The package essence is a directory (must have a __init__.py file), it is used to logically organize modules to import the essence of the package: Execute the package under the __init__.py file to import the module in the current

A. Ask a question, why do you have a function?1. Make the program simple2. Improve the readability of your codeDefinition of the function:def function name (parameter 1, parameter 2): Comment of---function--- print (' function body ')

This article mainly introduces Python selenium simulation jquery sliding unlock example, with a certain reference value, interested in small partners can refer to This article describes the Python selenium simulation jquery sliding unlock instance,

Implemented by Third-party Library qqbot, pip install Qqbot directly. Script directly run will pop up two-dimensional code, mobile QQ Scan Code login can Check weather forecasts by #weather# City Learn by #study# key value, stored

Python modifier learning notes, python decoration learning notes Definition: in essence, it is a function (other functions of the decorator) to add additional functions to other functions. Principle: 1. the source code of the decorated function