Python

！！！ Statement!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1. code example: #if语句#!/usr/bin/python3#_ *_coding:utf-8_*_num = 10if num = = 10:Print (' pair ')Operation Result:[email protected] ~]# python if.pyRight2. Complex if statement #注意事项:

# Python3 Import Request Package from Urllib ImportRequestImport SYSImport io# If you need print printing, you can set the output environment first if an exception occursSys.StdOut=Io.Textiowrapper (SYS.StdOut.Buffer, encoding=' Utf-8 ')# The URL

I. Ordering of dictionary elementsDict.keys (), Dict.values (), Dict.items ()It's a good idea to sort by combining Max, Min, sorted,zip , and also note how the dictionary lambda operation does not use zip :Price = { ' a ': 1, ' B ': 2, ' C '

Python Quick Start notesXu an 2018-3-71. Python Print#在Python3. x uses print () to output, and 2.x uses () the error print ("Hello World") print (' I\ ' m apple ') #如果全部使用单引号, you need to precede the escape character \+ quote print (' Apple ' + '

: Network Disk DownloadThe Python standard library by Example Developer's library Series Visit developers-library.com for a complete list of Avai Lable Products The Developer's Library Series from Addison-wesley provides practicing programmers with

The contours in the OpenCV21.1 Initial Knowledge ContourGoal? Understand what outlines are? Learn to look for outlines, draw outlines, etc.? Function: Cv2.findcontours (), cv2.drawcontours ()21.1.1 what is a contourA contour can be simply thought of

Encryption Algorithm Introduction HashHash, the general translation to do "hash", there is a direct transliteration of "hash", is the arbitrary length of the input (also known as pre-mapping, pre-image), through the hash algorithm, transformed into

1. Why Choose Anaconda?Anaconda solving Python use pain pointsPython works but the headache is that the package manages different versions of the Python issue, especially in the Windows environment.2. What is Anaconda?The anaconda features a

Note : This is a task spanning several years, and the title can also be called "learning statistics from the To Do list." When I was distressed by P-values a few years ago, I didn't know what Python was, and then, after touching Python, I liked the

1 1 2 While I : 3 if7: #如果不加i =i+1 Then the 7 is suspended. 4 i=i+1 5 continue 6 Else : 7 Print (i) 8 i=i+1 2.1+2+3+. +100i = 1a = 0while i3.1 to 100 oddi = 1while i4.1 to 100 eveni = 0while i5.1-2

f = ""s = ""i = 1sum = 0While I if I%2 = = 1 and i f = "-"sum = sum + Ielif i = = 99:f = "="sum = sum + Ielif I%2 = = 0:F = "+"sum = sum-is = s + str (i) + Fi + = 1Print (S,sum)#同时我也看到有人这样写的, inspired ...s = ""Start = 1sum = 0While start temp =

Python basic training Question 2-tuples, dictionaries, and python Basic Training 1. determine the value in the tuples >>> a = ( 1, 2, 3, 4, 10 )>>> 10 in aTrue>>> '10' in a False 2. Modify the values in the tuples. Because the tuples cannot be

Create a class in Python, execute the program when creating instance attributes, and create a python instanceFor example, you can understand the execution process of the program in this way: 1 -- open up a space in the memory to store the created

Full-stack Python development: python Assignment Method, python Assignment MethodChained assignment A = 1b = 1c = 1 # For variables with the same value, the following method can be used to assign a value for a = B = c = 1 print (id (a), a) print

Python learning notes (7) Python string (4), learning notes python Input and Output Input Function raw_input (Python3: input) 1 >>> raw_input ("enter a letter ") # To obtain A function 2 of the input content, enter A letter A 3 'A' 4 >>> 5 >>>> name

Use tensorflow to build CNN and tensorflow to build cnn Convolutional Neural Networks Convolutional Neural Network (CNN) transfers the data of an image to CNN. The original coating is composed of RGB, And then CNN thickened the thickness and the

Python web crawler PyQuery basic usage tutorial, pythonpyquery Preface The pyquery library is implemented in Python of jQuery. It can use jQuery syntax to parse HTML documents. It is easy-to-use and fast-to-use, and similar to BeautifulSoup, it is

Simple implementation of python load balancing, python Load Balancing implementation When talking about distributing requests, I believe most people will first think of Nginx. As a multi-function server, Nginx not only provides the reverse proxy to

Introduction to the requests module of python crawler and the requests module of python CrawlerIntroduction # Introduction: You can use requests to simulate browser requests. Compared with urllib, the api of the requests module is more convenient

Python3.5 simulate multi-Account Login, python3.5 simulate account Requirements: 1. Multiple accounts 2. Count three times 3. account and password pair-"allow" 4. incorrect account and password. Add the account to the blacklist three times later.