Python

Sorry, the upload was wrong. Then look at the picture!Since we're going to demonstrate with Pygame, his coordinate system is the y-axis downward, so here we also use the Y-downward coordinate system.The general idea of the algorithm is that the time

The meaning of the occurrence of string dataMastering the definition and characteristics of stringsAbility to master string common operations and learn about other factory methodsDefinition and creation of stringsA string is an ordered set of

http://python.jobbole.com/80912/Before I start, I want to make it clear that I'm going to explain some of the "tricks". They are not "best practices", at least in one case it is undesirable.Speaking of undesirable practices, I will write a "setup.py

Read the fileOpen a file with the open () method (open () to return a file object, which is iterative):>>> f = open (' Test.txt ', ' R ')R represents a text file, and RB is a binary file. (The default value for this mode parameter is R)If the file

A software use1 The first sentence of PythonIn the C packing directory, create 1.tx text, open and enter the following content to save.#！ /usr/bin/env python#-*-Coding:utf8-*-print ("Life is short, I learn python!")Open a DOS command window under

The algorithm refers to the solution problem accurate and complete description, is the clear instruction to solve the problem, uses the systematic method to describe solves the problem the strategy mechanism.LRU is one of the algorithms, so how to

Simple socket CommunicationServerImport socketsock_server = Socket.socket (socket.af_inet, socket. SOCK_STREAM) sock_server.setsockopt (socket. Sol_socket, SOCKET. SO_REUSEADDR, 1) # Reuse Address Port Sock_server.bind ((' 127.0.0.1 ', 8088))

Java layman uses Python to tune Java,First, install the Java Environment (Linux)1. The first thing to do is download the official website of Jdk,java SE 8 is http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html2

Python is a programming language that has risen rapidly and is very hot in recent years. The first programming language, which differs from our national universities, is often the C language, and Python becomes the entry-level programming language

22 Object-oriented---properties, class methods, static methods, reflectionone. Properties1. Attribute definition: The method is disguised as a property, although at the level of the code there is no advanced, but make it look more reasonable.

Re-module Regular expressionIt also means that the backslash is escaped, and Python needs a backslash in the RE module. \d is to match a number \+ greater than or equal to 1 \w match digit letter underline and middle bar \* matches 0 or

# # Open a file-fileobj = open (filename, mode)whichFileobj is the file object returned by open ()FileName is the string name of the fileMode is a substring that indicates the file type and operation 　　-the first letter of mode indicates its

The Deque module is an item in the Python standard library collections, which provides a sequence that can be manipulated at both ends, which means that you can perform add or delete operations before and after the sequence.1. Create the deque

IteratorsWe already know that there are several types of data that can be directly applied to a for loop :A class is a collection of data types, such as list,tuple,dict,set,str , and so on;A class is generator, including generators and generator

#-*-coding:utf-8-*-#definition of default parametersdefTest (a,b=10): Print(A +b)#The default parameter must be defined at the end of the parameter list and cannot be defined before the normal parameter#def Test (A,B=10,C)---this way of

Overview:UUIDis a 128-bit globally unique identifier, typically represented by a 32-byte string. It can guarantee the uniqueness of time and space, also known as the GUID, all called: uuid--Universally Unique IDentifier Python called UUID guid--

Introduction:data-driven Excel driver, is the data configuration in Excel, the main program calls every time with the data taken from Excel as parameters, to operate,what needs to be mastered is the operation of Excel, the flexibility to find the

Ternary operatorsmall = x if x If xAssert assertionWhen the condition behind this keyword is false, the program automatically crashes and throws a assertionerror exceptionWhile condition:Loop bodyFor loopFor-Target in expression:Loop

Case of an If statementThe above code, the output is: Audi BMW Subaru ToyotaIi. condition test (conditional expression, format)Each pieceiftrue falsepython The value tested by the condition is truefalseif statement. If the value of the condition

Python Script Example:1 ImportLogging.config2 #load the logging configuration file3Logging.config.fileConfig ("Logging_conf.ini")4 #get a logger named example5Logger = Logging.getlogger ("Example"# (If you create the name of the logger object