treehouse full stack

inheritance order, there is a situation and py3 different, such as, where bar does not inherit object (classic Class), depth first, other cases, are breadth first　　# Py27class Bar (): def F1 (self): print (' Bar ') class A (bar): def f (self): print (' a ') class C (a): def f (self): print (' C ') class B (bar): def F1 (self): print (' B ') class D (b): def F1 (self): print (' d ') Class E (c,d): def f (self): print (' e ') e = e () e.

() function, printing the ' F function ' >>end # f function finished, then execute the INNER1 function inside the print (' End ') >> End # Finally execute the INNER2 function inside the print ( ' End ')4, with parameters of the adornerThe front of the adorner itself without parameters, if you want to write a parameter of the adorner, then we need to write a three-layer adorner, and the front of the adorner is not too standard, the following to write a comparison specification with parameters of

Python full stack development-Day10 decorator (closed function application), python-day10I. decorator The decorator is an Application Scenario of closure functions. What is a closure function? Let's recall: Closure functions: A function defined within a function. The function contains a reference to the external function scope (emphasizing that the reference to the global scope name is not a closure). This

Python full stack development-Day9 function object, function nesting, namespace and scope, python-day9I. Function objects 1. functions are the first type of objects, that is, functions can be passed as data. 1 can be referenced 2 can be passed as a parameter 3 return value can be an element of function 4 can be used as a container type Ii. Use this feature to elegantly replace if 1 def foo (): 2 print ('foo

)③ other element typesImages (IMG, map)Objects (object, emed)Where is the misunderstanding? Why is semantic tagging important? Semi-structured and structured?Structure Label * * ** Pure Structure Label-Center-center align Block-Div-Common block control tags-span-common inline containers-BR-line break-head-heads-Body-Body* It's important to look at the structure of the label.-Default Structure property of the label itself (block element or content Element)-Convert to each otherSemantic tags * * *

codeelse: otherwise (i.e. "the above conditions are not valid")Y + = I executes this codePrint S-yB. Complex processesName = raw_input (' Please input your name: ')If name = = ' Shaw ': condition 1 establishedprint "Hello Handsome!" "The implementation of this paragraphelif name = = ' Stiven ': Condition 2 establishedprint ' You're OK ' to perform this sectionelif name = = ' Sam ': Condition 3 establishedPrint ' Why are you so sad ... ' To perform this sectionElse: The above conditions are not

: #! /Usr/bin/env python # _ * _ coding: UTF-8 _ * _ def Counter (Index, Start, End): print ("% d calculation, the first digit is % d, and the second digit is % d "% (Index, Start, End) if Index = 10: # If the value to be calculated is 10, exit return Start N = Start + End # N equals to the first Number plus the second Number = Counter (Index + 1, End, N) # continue to call the Counter function. End is equivalent to the first number passed to the function. N is the second number passed to the fu

. com domain receives the request, it will find a management. com domain's next-level DNS server address (baidu.com) to the local DNS server if it cannot implement the resolution itself. When the local DNS server receives this address, it will find the baidu.com domain server, repeat the above 3,2,1 action to query until the www.baidu.com host is found.(5), the data is embedded in the TCP packet returned.4. TCP protocolThe TCP protocol embeds the port of the HTTP protocol in the packet and sends

. com domain receives the request, it will find a management. com domain's next-level DNS server address (baidu.com) to the local DNS server if it cannot implement the resolution itself. When the local DNS server receives this address, it will find the baidu.com domain server, repeat the above 3,2,1 action to query until the www.baidu.com host is found.(5), the data is embedded in the TCP packet returned.4. TCP protocolThe TCP protocol embeds the port of the HTTP protocol in the packet and sends

. Although it is also a batch model, this computer provides a fast interactive mode that allows users to think that they are using exclusive resources.The third generation of computers in the use of the necessary hardware protection programs (memory between programs, hard disk isolation), the user data will not penetrate between the leakage, only widely popular.Fourth generation computer (1980-present): PCThere are hardware support, an operating system, and a supercomputer that is composed of ap

in memoryThe default encoding for the interpreter read file is Utf-8str = = Unicode Bytes==bytesCharacter encodingDecode () decodingEncode () encodingDecoding of all formats is first decoded into Unicode format and then compiled.File operationsf = open ("Text.txt", encoding= "Utf-8") #默认以utf-8 explanationPrint (F.read ())Level three menu optimized editionMenu = {' Beijing ': {' Haidian ': {' Five crossing ': {' Soho ': {},' NetEase ': {},' Google ': {}},' Zhongguancun ': {' Iqiyi art ': {},' Au

outside the function are global variables, inside the function are local variables, Python built-in variables. Follow the variable lookup order of the local > global> built-in.For ease of differentiation, global variables are all capitalized. If you need to use global variables within a function, you need to precede the variables with global.1 defTop_movies (num=5, *args, * *Kwargs):2 Print(num)3 Print(args)4 Print(Kwargs)5 6Rank = (0, 1, 2, 3, 4, 5)7Keywords = {'1':'The Shawshank R

(' field name ' __ ' cross-table field name ', ' cross-table field contents ')@login_authdef search_info (request): #获取用户请求的数据 user_post = json.loads (request. get[' search_list ') Print user_post #生成搜索对象 serach_q = Q () #循环字典并生成搜索条件集合 for k,v in User_post.items (): #生成一个搜索结合 q = q () #生命集合中的搜索条件为 ' or ' condition q.connector = ' or ' #循环字典中的value, value is the set of conditions passed by the front end. For I in V: #在搜索条件集合中增加条件, the condition is tuple form, K is the key! in the d

rules-i: making changes to files-f: write ' rules to file1. positioning: sed ' 3 ' test2, d Delete sed ' 3d ' test: Delete line 3rd3, p copy sed ' 3p ' test: print third line, (re-copy Output)4, c change sed ' 3c ' 11111111 test: change the file on the third row5, a append sed ' 3a ' 11111111 test: append files after the third line6, i insert sed ' 3i ' 1111111 test: insert a row of files before the third Line.Regular location and then the Write-only command is not positioned, All files are loc

buy:%s"%shopping_car[i]) #打印购物车中的东西Print ("balance Money Is:%s"%salary) #打印余额Print ("--------------------------------")ElsePrint ("!!!! You are not having so money!!!! ") #钱不够, can't buy!Print ("you balance Money Is:%s"%salary) #提示有多少钱!If Len (shopping_car) > 0: #判断是否买了东西, buy it and print it without buying it.Print (shopping_car)Print ("--------------------------------")#break #没钱买了还扯蛋!!!ElsePrint ("we are not having this good,please choice Again!") #输入的数字大于序列号, Print without this productelif

the added dictionarydic["k4"] = "v4" #{' K1 ': ' v1 ', ' K2 ': ' v2 ', ' K3 ': [one, one, one], ' K4 ': ' v4 '}E. In the modified dictionary, the value of "k1" corresponds to "alex", output the modified dictionarydic["k1"] = "alex" #{' K1 ': ' Alex ', ' K3 ': [one, one, one], ' K2 ': ' v2 '}F. Please append an element 44 to the value of the k3, and output the modified dictionaryDic["k3"].append (44)#{' K1 ': ' v1 ', ' K3 ': [one, one, one, one], ' K2 ': ' v2 '}G. Insert element 18 in the 1th po

IOS full-stack siege Lion (PHP) -- Session3 processes client input What? Client IP URI (resource path) accessed by the client) User-Agent GET parameters (parameters passed in using URLs) POST parameters (parameters input using HTTP Body) are common client input content and are various data sent to the server during client access to the server. How? GET It is very easy to GET input using PHP. GET

Full-stack JavaScript path (22) IE proprietary extension-document mode, javascript path Ie8 introduces a new concept, "document mode". The document mode of the page determines what functions can be used. That is to say, the "document mode" determines the level of css you can use and what APIs you can use in javascript, And how to treat the document type (doctype ). You can modify the parameters in eith

Full-stack JavaScript path (23) DOM2 and DOM3, involving XML namespace extension (1), dom2dom3 The preceding example shows how to use xmlns to specify a namespace and use xmlns: prefix to specify a prefix. Once a prefix is specified, it must be used for the current element and child element. Sometimes, to avoid conflicts between different languages, you also need to use namespaces to limit features, as s

Full-stack JavaScript (24) DOM2 and DOM3, which do not involve XML namespace extension, dom2dom3 (1) three attributes are added to the DocumentType change: publicId, systemId, and internalSubset (internal subset) You can access the file by using document.doctype.publicId,document.doctype.systemId,document.doc type. internalSubset. Export document.doc type. internalSubset will get " (2) importNode () m