Python

Conditional judgmentSimple if statement>>>name= ' Lily ' >>>if name= ' lily ': print ' Hello, ', namehello,lilyIf-else>>>score=90>>>if score>=80: print ' very good ' else: print ' keep trying ' very goodIf-elif-else>>> age=18>>>

The reference code is as follows:1. User Login Program Flow control code:1 #edited by: Shanlong2 if __name__=='__main__':3 Importuserloginfuncation4Loclcount=[];5 whileTrue:6UserName = input ("User name:>>")7

The following are the various operations of the list data type list. append (x) Add an element to the end of the list Add an item to the end of the list; Equivalent to a[len(a):] = [x] .

1. What is the role of print ()?will display some text in the Output window650) this.width=650; "src=" Https://s1.51cto.com/wyfs02/M02/8F/B0/wKiom1jpuNySRNp4AABXreNF1K4404.png "title=" Q1.png "alt=" Wkiom1jpunysrnp4aabxrenf1k4404.png "/>2. Enter 5+8,

First step: Install Python https://www.python.org/Note: Enter Python in the cmd window if the environment variable path is not required for internal or external command configuration; Right-click My Computer------high-level--environment

Three-time Login answer:User Password file:#file:p asswdlulu|123luchuan|123User lock File:#file: LockedluluCode:Count = 0 # Enter three times to determine whether to continue, counter lock_num = 1 # three times after the password error is locked,

The content of this section1. Basic function syntax and features2. Parameters and Local variables3. Return valueNested functions4. Recursion5. Anonymous functions6. Introduction to Functional programming7. Higher-order functions8. Built-in

1, Bytes is mainly for the computer to see, string is mainly for people to see2, the middle of a bridge is the code rules, now the trend is UTF83, Bytes object is binary, it is easy to convert into 16, such as \x644. String is what we see, such as '

python string substitution is a frequently encountered problem when Python is manipulating strings, so here's a quick introduction to the string substitution method.Python string substitution can be implemented in 2 ways:1 is the method of using the

The random module in Python is primarily used to generate random numbers1 #!/usr/bin/env python2 #Coding:utf-83 4 ImportRandom One #1, Random.random () returns a random number that produces a value between 0-1 AA =random.random () - Print('A:', a) #

Why use a function:1, solve the problem of code reuse2, improve the maintainability of the code, unified maintenance3, the organization structure of the program is clear, the readability is strongDefining functionsFirst define after use!!!def

These two days of graduation design to use the Caffe, in the image preprocessing to call the Python Caffe interface, the results appearImportError: No module named _caffeSo I found a variety of solutions on the Internet, and finally discovered that

Web crawler, we can think of it as crawling on the network of a spider, the internet, such as a large network, and the crawler like a spider crawling up and down, meet the resources it can crawl it down.Enter a URL in the browser, that is, to open a

Python functionsFunctions are well-organized, reusable pieces of code that are used to implement a single, or associated function.Functions can improve the modularity of the application, and the reuse of the code. You already know that Python

Preface: Many Python tutorials, the interpretation of Python is not easy to understand, this article records their own understanding and experience, is a preliminary understanding of iterators and generators.Iterators:The essence of an iterator is

The previous article said how the server sends a string to the client, this article we say, how to send an article to the client (browser).Write a server side of a socket#!/usr/bin/env python# coding:utf-8import socketdef handle_request (client):  

Recently, using Python to crawl some data, Anjuke's data took a long time to recordBecause of the current technology is limited, in Chrome can not find Ajax post or get data, once helpless, and then inadvertently discovered its mobile web site,

In my opinion, the Python community is divided into three genres, namely Python 2.x organization, 3.x organization and PyPy organization. This classification can basically be rooted in the compatibility and speed of class libraries. This article

The path to python, the path to python Input, user interaction, 1 #! /Usr/bin/env python 2 3 name = input ("your name is:") 4 age = int (input ("your age :")) 5 job = input ("your job:") 6 salary = input ("your salary :") 7 8 info = '''9 ---------

Python study notes, python notes Python learning notes are mainly used to do trivial things in python. Read and Write txt, read and write excel, read and write xml, Access Database   Using python to read and write excel files, we mainly reference