Python

Queue:Advanced First OutLast in, first outVIP (Priority level)ImportQueue#q = queue. Lifoqueue () #后进先出##q.put (1)#q.put (2)#Q.put (3)#print (Q.get ())#print (Q.get ())#print (Q.get ())Q =queue. Priorityqueue () Q.put (10,"Alex")) Q.put (-1,"CHENGRH"

One. Python Object type1. The object is the most basic concept of Python, a Python program can be decomposed into modules, statements, expressions, and objects. Their relationship is as follows:(1) The program is composed of modules(2) module

Reference documents:when creating, changing, and locating variable names in a Python program, it is done in a space where variable names are stored, which we call namespaces, also known as scopes.Global scope: A variable defined in the module

I write a blog is to better understand the Python programming, so the big guy skip to spray, if the wrong place to welcome guidance.What is object-oriented programming?A little bit of leather is still possible .... But the skin is tens of thousands

What does Python call a custom module method? The Python module is a python file that ends with a . py , including the python object definition and Python statements can make python snippets More logical, useful, and understandable, since the

What does python call a custom module method? The Python module is a python file that ends with a . py , including the python object definition and Python statements that make python snippets More logical, useful, and understandable, since the

It is easier to remember with the built-in SETL1 = [' B ', ' C ', ' d ', ' B ', ' C ', ' A ', ' a ']L2 = List (set (L1)) Print L2 There is also a speed difference that is said to be faster, not tested, L1 = [' B ', ' C ', ' d ', ' B ', ' C ', ' A ',

Characteristics of recursion:1. Calling its own function2. There is an end condition3. Recursive efficiency is not high, may lead to stack overflow (function calls are implemented through the data structure of the stack, each into a function call,

Concept of function # concept # wrote a piece of code to implement a small function; Then put the code into one piece and start with a name; The next time you can use this code block again under this name, this is the function # Action #

Purpose of Study:A regular expression is a logical formula for string manipulation, which is a "rule string" that is used to express a filtering logic for a string, using some pre-defined character characters and combinations of these

The OS module is a python built-in module,mainly on a large number of files and a large number of paths to operate OS.SEP: Supersedes the operating system-specific path delimiter Os.name: Indicates the work platform you are using. For example, for

Tag: element while specifying log tee pos input table Operation one# Enter a data to delete all the specified elements from a list# The given list datadata = [1,2,3,4,5,6,7,8,9,0,5,4,3,5, "B", "A", "C", "F", "D", "B", "A", "C",]Print ("Prints the

I. Recursion and iterationRecursion is calling itselfIteration is that each iteration is dependent on the last resultIi. What is an iterator protocol1, iterator protocol refers to: the object must provide a next method, the execution of the method

Object-oriented concepts are classes (class) and instances (Instance), and it is important to keep in mind that classes are abstract templates, such as student classes, and instances are specific "objects" that are created from classes, each with

First, the module classification:1. Standard library module: Python comes with, directly using the import can be used directly;2. Third-party library: External use, need to download first (pip install module_name)3. Program Customization Module: The

A Python operating network, which is to open a Web site, or request an HTTP interface, using the Urllib module.Urllib module is a standard module, directly import Urllib can, in Python3 inside only urllib module, in Python2 There are urllib module

Created: Np.array ()A = Np.array ([1,2,3,4= Np.array ([1,2,3, 4] [4,5,6,7] [7,8,9,ten])a[1,2,3,4]b[[1,2,3,4 ],[4,5,6,7],[7,8, 9, [ten]]Get: Tuple of the length of each axis of an array shape . Shape ()>>a.shape (4,)>>b.shape (3,4)Modify the length

This article mainly introduces Microsoft's official Python plugin, has brought many features, the following is the plugin function description, some of which I did the translation, the need for friends can refer to the next MS python plugin. This

This article mainly describes the Vscode under the configuration of the Python debugging Run environment method, the need for friends can refer to the following Vscode Configuring the Python Debugging Environment A long time ago a thing, turned out

This article mainly describes how to write files in the Python file txt, small series feel very good, and now share to everyone, but also for everyone to make a reference. Let's take a look at it with a little knitting. 1. Write your own