treehouse full stack

Meta-groupWhat is a tuple: "Tuples are an immutable list" (not lists, just for ease of memory)Purpose: Used for storing multiple values, can only be read and cannot be assigned two timesRepresentation: parentheses () divide the elements with commas in the middleegtuples = ('a','b','C',' D')Common operations for tuplesTo generate a simple tupletuples = tuple (range (5))print(tuples) #结果 (0, 1, 2, 3, 4)Len (tuple)# Computational element leader degree tuples = (0, 1, 2, 3, 4)print# results: 5In an

Python full stack Road series of mySQL in-table operationsFirst create a table for testing-- Creating a database Createdatabasedbnamedefaultcharsetutf8collateutf8_ general_ci;-- CREATE TABLE createtable ' TB ' ( ' id ' int (5) NOTNULL auto_increment, ' name ' char NOTNULL, ' Alias ' varchar (Ten) defaultnull, ' email ' varchar (DEFAULTNULL, ' password ' varchar NOTNULL, ' phone ' char (one) DEFAULT ' 138

queue is empty, then get is blockedWhy do you want to specify the length of the queue? is to prevent memory explosion.A queue that cannot be stored indefinitely. After all, there is a limit to memory.The put, get, qsize, full and empty mentioned above are not allowed.Items may be added or deleted in the queue because of the results returned and the results are used later in the program. On some systems, this method may throw an Notimplementederror ex

Maybe I should be close to a full stack engineer.WinForm:Developed an IDE, design, research and development, a person that lasted two years to three years (spare time).The idea is simple, a tool that can be dragged and dragged to build the application without writing code, encapsulating all the business operations imaginable, and organizing the operations in a configuration way.The runtime was implemented u

= ' r ') existing = f[' key ']f.close () print (existing)Since shelve does not record any modifications to the persisted object by default, we need to modify the default parameters at Shelve.open () or the object's modifications will not be saved.# set Writebackimport shelvef1 = Shelve.open (' shelve_file ') print (f1[' key ') f1[' key ' [' new_value '] = ' This is not here Before ' f1.close () F2 = Shelve.open (' Shelve_file ', writeback=true) print (f2[' key ') ' f2[' key ' [' new_value '] = '

queue. Q.full (): When this method is called, Q is full to return true, and the result is unreliable, for example, in the process of returning true, if the items in the queue are taken away. Q.qsize (): Returns the correct number of current items in the queue, and the results are unreliable, for the same reason as Q.empty () and Q.full ()Application:#队列 # 1. You can put any type of # 2 into the queue. FIFO from multiprocessing import process,queueq=

When hackathon encounters full-stack engineers and hackathon encountersOn February 24, April 17, he participated in the HackAthon24 hackathon organized by Sina Weibo platform architecture. I think it's the first time I 've participated in this type of technical activity. I feel novel and passionate. In fact, I feel that the back-end engineers have little advantage in this innovation competition. Fortunately

old boyis a domestic group early to do Python training institutions, the following small series for the Python Automation course and the full stack of lessons to do a summary, hope to help you:python full stack development:Suitable for the crowd: fresh undergraduates, specialties, and 0 basic studentsLearning Basics: 0

has disappeared according to the aircraft statuspublic void Drawmyself (Graphics g) {if (live) {Super.drawmyself (g);Calculates the aircraft's new coordinates according to the directionif (left) {X-= speed;}if (right) {x + = speed;}if (UP) {Y-= speed;}if (down) {Y + = speed;}}}In this way, when the program is run, a collision of shells and planes occurs, and the plane disappears, as shown in result 1:650) this.width=650; "Src=" https://s3.51cto.com/wyfs02/M02/9D/B1/wKiom1mEE3iwB7qLAAGDTKvaLm060

SetBounds () are the upper-left coordinates of the control, and the last two parameters are the width and height of the control */ Lbltitle.setbounds (100, 10, 100, 30); Lblusername.setbounds (20, 60, 75, 25); Lbluserpwd.setbounds (20, 100, 75, 25); Txtusername.setbounds (100, 60, 120, 25); Pwduserpwd.setbounds (100, 100, 120, 25); Btnlogin.setbounds (50, 140, 75, 25); Btnquit.setbounds (150, 140, 75, 25); Press all controls on the container Pnlmain.add (Lbltitle); Pnlm

Internship module Vue+java small full stack development (iii)--dxBackgroundFirst of all, give yourself an answer: this blog I defined as (iii), because the previous two module page, the content is the same, but was changed several times the demand, has been dragged without uploading.Today is the real meaning of the full stack