Python

After more than 10 years of procedures, recently changed to do the website, after a survey of research, the final selection of beautiful picture station HTTP://www.gg4493.cn.This brings a problem, you must go to the site of the major beauty site for

1, ternary operation#1. Ternary Operationa one-step operation that returns a large value in a B can be achieved using the following methoddefMy_max (b): C=0 A=int (Input ('Please enter')) b=int (Input ('Please enter')) #if a>b: #C=a

Linux Source compiled Python 3.61. Operating system and version display# UNAME-SRLinux 3.10.0-514.el7.x86_64# UNAME-SRLinux 3.10.0-514.el7.x86_642. Download the Python installation package# wget

Initialize the value of the dictionary to a list and add the data in:For Index,item in Enumerate (cols):Cols_dict.setdefault (item,[]). Append (Index)The list has Chinese, join connection output:' \ t '. Join (I.decode (' utf-8 ') for I on line)' \

Python Basic Property functions LearnImport this: "The Zen of Python"#: Annotation Characters# ENCODING=GBK: Chinese input referenceTitle (): Each word is displayed in uppercase letters, and the first letter of each word is changed to

Enterprise application-On duty, 135 messages a week to the students to clean the health. The script takes advantage of Linux's timed task crontab to run once a day.1. Turn on the crontab log.Crontab does not turn on the log by default, so start the

#列表: Lists can be nested.Word=[' A ', ' B ', ' C ']A=WORD[2] #通过索引访问列表Print "A is:" +aA is:cWord=[' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' G ']B=word[1:3] #取从1开始到3前面的元素Print B[' B ', ' C ']B=word[1:2]Print B[' B ']Print Word[1:4] #取从1开始到4前面的元素['

Proxy pattern: Provides a proxy for other objects to control access to this object1 #!/usr/bin/env python2 #-*-coding:utf-8-*-3 4 __author__='Andy'5 6 """7 Liar design Mode8 design mode--proxy mode9 Proxy Pattern: Provides a proxy for other objects

MyEclipse10 configuration Pydev for Python development1. Download Pydev 2.7.1 link as follows: Http://jaist.dl.sourceforge.net/project/pydev/pydev/PyDev%202.7.1/PyDev%202.7.1.zip2. Download/python-2.7.3 link as

ImportNumPy as NPdefBuild_chessboard (N): Chessboard=Np.zeros ((n,n))returnChessboarddefPrint_chessboard (chessboard): N=Len (chessboard) forRinchRange (N): forCinchRange (N):ifCHESSBOARD[R,C] = = 1: Print('Q', end="") Else:

Using _slots_Under normal circumstances, when you define a class and create an instance of class, you can bind any property and method to the instance, which is the flexibility of dynamic language. Define class First:class Student (object):

Scenario: When a colleague needs you to pass a file on the server to him, you can actually use Python to open a downloader, directly to the URL to a colleague.1) View the Python version (because there are some differences between the Python2 and

List and GansoDemo of list values and slices:strings = [' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' G ']print (Strings[0]) # are counted starting from 0, so the first element is 0print (Strings[1:4]) # Slice, starting from the starting point, But

Product_list = [(' iphone ', 5800), (' iwatch ', 2400), (' book ', +), (' Apple ')] #创建列表库Shoppinglist = [] #定义购物车的列表Salary = input ("Input your Salary:")If Salary.isdigit (): #判断输入的salary是否为数字salary = Int (salary) #声明为整型While True: #当为真For

First, catch the exception1, when the program error, will not show the bug information to the user, but to provide a friendly prompt, continue to execute the program2, the following, to achieve division, when the denominator is 0 o'clock, capture

common methods for locating individual elements Take the Baidu search box Preexcitation as an example, the blue position is the property that navigates to the input box:

Set Relationship test:List_1=[1,4,5,7,3,6,7,9]list_1=set (list_1) #去重list_2 =set ([2,6,0,66,22,8]) print (List_1,type (list_1)) #集合是无序的print (list_1,list_2) Print (List_1.intersection (list_2)) #交集print (List_1 & list_2) #交集print (List_1.union (list_

List:1. That is, list, which is the data type built into Python. Its form is: a = [1, 2, 3, 4, 5]2. The values in the list can be changed, that is, you can: a[0] = 100, change the No. 0 element of the list to 1003.Meta-group:That is, a tuple, also a

The function return value is the built-in function name:def sum(*args): def sum_in():Ax = 0For N in args:AX = ax + Nreturn AXreturn sum_inWhen we call sum() , we return the SUM function instead of summing the result:>>> f = sum(1, 3, 5, 7, 9)>>>

Python3.0 simulates user logon, three error locks, and python3.0 User Logon# -*- coding:utf-8 -*-# Simulate user logon as required. login is not allowed due to more than three error lockscount = 0 #realname passwdReal_Username = "test"Real_Password =