python for absolute beginners

Use Python to write your own Simple zip compression software with a complete picture (suitable for beginners), pythonzipI. Software Description Use the Python tkinter module to write your own compression software. The zip file format is a common document compression standard. In the ziplib module, ZipFile is used to operate zip files. It has the following functio

This article is divided into the following sections Concept Address issues As a function parameter Variable parameters are used in a class function default Parameters Differences in the implementation of the class ConceptThe difference between a mutable object and an immutable object is whether the object itself is mutable.Some of the types built into Python mutable objects: List dict set Immutable object

What is a data structure?Data structure refers to the existence of one or more relationships between the collection of elements and the data elements in the collection of the relationship between the composition.Here's an example to understand this data structure:Data can be likened to books, data structure equivalent to bookshelves, books stored on the shelves, to hold books, we get the shelves to fetch. In order to get the desired book faster, you can arrange the book in a certain way. For exa

): return (self.x+self.y)*2 def getArea(self): return self.x * self.yrect=Rectangle(3,4)print(rect.getArea())print(rect.getPeri()) Purpose: delete an object. Class C: def _ init _ (self): print ("I'm _ init _, I was called") def _ del _ (self): print ("I am _ del _ method, I was called") c1 = C () c2 = c1c3 = c2del c3del c2del c1 Let's talk about several common magic methods first, and then we will continue to add them. The above is the content of the magic methods in class

Python: For beginners of Level 3 menus, # Implement three levels of menus at the provincial and municipal levels #! /User/bin/env pythoncitys = {"Guangdong Province": {"Guangzhou City": ["Panyu District", "Tianhe District", "Baiyun district"], "Shenzhen City ": ["Nanshan District", "Baoan District", "Luohu District"], "Huizhou City": ["Huidong", "huiyang", "Freshwater"]}, "Hunan Province ": {"Wuhan": ["Yell

Tips for beginners of PythonThe following are some Python practical skills and tools I have collected in recent years. I hope they will help you. Swap variable x = 6y = 5x, y = y, xprint x >>> 5 print y >>> 6 if statement in the row print "Hello" if True else "World" >>> the last method under the Hello connection is to bind two different types of objects appear cool. Nfc = ["Packers", "49ers"] afc = ["Raven

个字典' Zhang San ': {' 2018.3.23 ': ' Not delivered ', ' 2018.3.24 ': ' Delivered '},' John Doe ': {' 2018.3.23 ': ' Delivered ', ' 2018.3.24 ': ' Delivered '},' Liu Wu ': {' 2018.3.23 ': ' Not delivered ', ' 2018.3.24 ': ' Not Delivered '},}For I in range (3): #进入三次循环Operation = input ("'1. View Student Assignments2. Entry of student assignmentsPlease select the action you want to do: "). Strip ()if operation = = ' 1 ': #选择查看学生信息, print out all student informationFor k,v in Homeworks.items ():Pri