Python

According to the Official document explanation (Https://docs.python.org/3.5/library/platform.html#module-platform):The code for learning other people is as follows:#Python platform#Author:hongten#Mailto: [email protected]#Blog:http://www.cnblogs.com/

What is a regular expressionA regular expression is a logical formula for the manipulation of a string, which is defined in advance by certain characters, and the combination of these specific characters, forming a "regular character", the "regular

The string contains constants and templates for working with

18. CollectionUnordered, non-repeating data combination1. Go to the heavy2. Relationship TestingList_1 = [1, 4, 5, 7, 3, 6, 7, 9]List_1 = Set (list_1)List_2 = Set ([2, 66, 0, 6, 22, 8, 4])List_3 = Set ([1, 5, 7])# intersection# set ([4, 6])Print

1. Defining stringsThe string has a subscript starting with 0, and [] can be used to remove the label2. String readingThe string can use loop for, one at a time to take out each element of the Loop object3. String modification-string not

Decorative Devicedef deco (count): def func (num): if num 　　Note: The count in Deco (count) and the following count (Num) is just a formal parameter, and count can be replaced with any variable name, but Num must have it, so the passed

Matplotlib is a Python 2D drawing library that generates publishing quality-level graphics in a variety of hard-copy formats and cross-platform interactive environments.Bar chart#Coding:utf-8ImportMatplotlib.pyplot as PltImportNumPy as

A. zip function: Accepts any number of sequences (including 0 and 1) as parameters, returning a tuple list.1. Example 1:x = [1, 2, 3]y = [4, 5, 6]z = [7, 8, 9]xyz = Zip (x, y, z) print xyzThe result of the operation is:[(1, 4, 7), (2, 5, 8), (3, 6, 9

Object-Oriented ProgrammingObject-oriented programming is a programmatic approach that requires the use of "classes" and "objects" to implement:A class is a template, a template can contain multiple functions, function to implement some functions,

A tkinter:tkinter is a python-backed library of TK, and Python code calls the native GUI (TKL language development) provided by the Tkinter->tk-> operating system to complete the interface development without the need to install any third-party

Deque (maxlen=n) creates a fixed-length queue that automatically moves except for the oldest record when a new record is added and the queue is full. 1 from collections import deque 2 d=deque ( Maxlen=3) 3 d.append (1" 4 d.append (2 5

Python list:The format of the list is:list=["Index1", "Index2", "#list为列表名", index1,index2,1,2 as a list element.The above is a simple list, how to get the elements in the output list? ：#列表每个元素都有个下标, get the element values from the list according to

Here's a small piece to bring you a python how to quickly find out the differences in the data of two electronic tables. Small series feel very good, now share to everyone, also for everyone to make a reference. Let's take a look at it with a little

To be a crawler, the inevitable use of regular expressions, if it is a simple string processing, similar to split,substring and so on is enough, but involves a more complex match, of course, is the world, The following article mainly introduces the

This article mainly introduces the Python 3 using BeautifulSoup Fetch P tag method, the text gives the detailed sample code for everyone to reference the study, to everyone has a certain reference learning value, needs of friends below to see

Shopping Cart SimulationDemand: According to the user input and output corresponding to the backend The server information can be added backend and Sever information to delete backend and sever information When you add server

Python-crawler & Problem Solving & Thinking (1), python Crawler Recently, I just got started with python and found some small tasks to train my hands. I hope I can continue to improve my problem solving skills in practice. This small crawler is a

Agricultural University Library-news announcement anti-crawler and Agricultural University Crawler1, address: http://lib.henau.edu.cn/Default/go? SortID = 109 Anti-crawler mechanism, through cookie value. 1st requests to this address will check the

Python common built-in modules-xml module (detailed description), pythonxml Xml can be used to tag data and define data types. It is a source language that allows you to define your own markup language. The structure is similar to HTML hypertext

Day6 OS module, day6os OS Module Provides an interface for calling the operating system. (1) OS. getcwd () obtains the current working directory, that is, the directory path of the current python script. >>> OS. getcwd () obtains the directory path