Python

In order to write maintainable code, we grouped many functions into separate files so that each file contained relatively few code, and many programming languages used this way of organizing code. In Python, a. py file is called a module.Why use a

Python character encodingFirst, the text editor accesses the file principle;Opening the editing machine opens a process that starts, in memory, the editor's writing is kept in memory, and the memory outage can cause the data to be lost.So, all the

Use of __name__ and __main__#hello. pyDef SayHello (): str= "Hello" Print (str);if __name__ = = "__main__": Print (' This is main of module ' hello.py ') SayHello ()This calls itself to execute all, the following is the execution result,

Bottle is a lightweight pythonWeb Framework, can be adapted to a variety ofWeb Server, including Python's own wsgiref (default), Gevent, Cherrypy,gunicorn, and so on. Bottle is a single-file release, the source code can be downloaded here, the

Python Basics ModuleA module is a file that contains the Python definition and declaration, and the filename is the suffix of the module name plus the. Py.is a python file that defines classes and methods, implements functions that can be called by

1. Definition of a two-fork lookup tree:When the left dial hand tree is not empty. When the node value of the Zuozi is less than the root, and the right subtree is not empty, the node value of the right subtree is greater than the root node. The

Origin:The project process needs to study YOUTUBE_DL this open source component, through the use of the class, compared to C # and Delphi implementation, feel the Python property mechanism is very interesting.The distinction and the single entrance

Image processing is a very wide-spread technology, and Python, which has a very rich third-party expansion library, will certainly not miss this feast. PIL (Python Imaging library) is the most commonly used image processing library in Python,

Python uses the open () function to open the file return object:Open second parameter "R" Open a file as read-only "W" Open file in Write method, overwrite stored content "X" Open throws

Let's go with the problem, the same problem with the implementation of the integer object:>>> a='ABC' >>> b='abc' is Btrue>>> c='ABC' *10>>> d='ABC' is cfalseWhy? In the implementation of integer objects, treats small integers with small integer

Sorting algorithmsSorting is also an algorithm that is often used in programs. Whether you use bubble sorting or fast sorting, the core of the sort is to compare the size of the two elements. If it is a number, we can compare it directly, but what

Because a function is also an object, and a function object can be assigned to a variable, the function can also be called through a variable.>>> def now():... print(‘2015-3-25‘)...>>> f = now>>> f()2015-3-25A function object has a __name__ property

Second module learning: Generators, iterators, built-in functionsGenerator features: Only when the corresponding data is generated at the time of invocation, the speed of running is fast!Example:1 defFil (max):#Fibonacci number2n,a,b=0,0,1#Defining

Filter read: 265432Python's built-in filter() functions are used to filter the sequence.and map() similar, filter() also receive a function and a sequence. And the map() difference is that the filter() incoming function acts on each element in turn,

This article wants to provide a fool-style tutorial to enable readers to successfully install Python and Pip, the need for friends can refer to the following This article wants to provide a fool-style tutorial that will enable readers to

This article mainly introduces the construction of Python environment under Windows System (Aptana Studio), the need for friends can refer to the following 1, first visit http://www.python.org/download/to download the latest version of Python. 2,

Python itself has many very useful modules that can be used immediately as soon as the installation is Complete.Our built-in sys modules, for example, write a hello module: #!/usr/bin/env python3#-*-coding:utf-8-*- ' a test module ' __author__ = '

Python tutorial (2.1) -- The First Python program, python2.1 In this section, we will learn how to write a simple Python program.   We know that many programming languages are learning how to output "Hello, world" at the beginning, right? Now let's

After django is upgraded from 1.7 to 1.9, the system prompts RemovedInDjango110Warning, django1.9.7. After the Django project upgrades django from 1.7 to 1.9, a large number of errors are reported. You need to make the following changes. 1.

Python Socket, pythonsocket     Socket_server: Import socketimport osport = 9000 host = "127.0.0.1" ADDR = (host, port) with socket. socket (socket. AF_INET, socket. SOCK_STREAM) as server: server. bind (ADDR) server. listen (5) while True: print