flask decorators

parameter == ‘task1‘: start_time = time.time() func(*args, **kwargs) stop_time = time.time() print("the task1 run time is :", stop_time - start_time) elif parameter == ‘task2‘: start_time = time.time() func(*args, **kwargs) stop_time = time.time() print("the task2 run time is :", stop_time - start_time) return wrapper return outer_wrapper@timer(parameter=‘

return values, it needs to be further perfected. Adorners capable of handling return values:def guess_win(func): def rooftop_status(): result = func() print(‘天台已满，请排队！‘) return result return rooftop_status@guess_windef german_team(): print(‘德国必胜！‘) Output Result:德国必胜！ 天台已满，请排队！ 赢了会所嫩模！输了下海干活！adorners capable of handling parameters:def guess_win(func): def rooftop_status(*args, **kwargs): result = func(*args, **kwargs) print(‘天台已满，请排队！‘) r

webpage, the function is: the user passes in a URL, the function returns the result of the download pageWuyi fromUrllib.requestImportUrlopen the - #def get_html (URL): Wu #print (Urlopen (URL). Read ()) - # About #get_html (' http://www.baidu.com ') $ #2. To write the adorner for topic 1, the ability to cache Web content: - #specific: The implementation of the download page is stored in the file, if the file has a value (the file size is not 0), the priority is to read the page content from t

Content review:1.flask-sessionFrom Flask Import sessionFrom flask_session Import sessionapp.config["Sesstion_tpye"] = "Redis"app.config["Sesstion_redis"] = REDIS ("IP", port,db=1)# select 1-----[1]Session (APP)session["key"] = "value"session["Key"]2.Flask CBVClass Index (views. Methodview):methods = ["GET"]decorators =

executes.'func ()#Execute function Print 'I'll do something after the target function executes.' returnnei@zsq#The function below is automatically passed as a parameter to the decoration function .deflogin ():Print 'I have a login function'Login ()　　These little conveniences are also called Python's syntactic sugars, and you may have seen this in many places.Adorner with parameters:defzsq (a):Print 'I'm the decorator's parameter.', adefnei (func):Print 'I do some things before the inc

Talking about the exploration of python decorators and the collection of parameters, talking about the exploration of python decorations First, go to the original article: Now, let's assume that we want to enhance the functions of the now () function, for example, to automatically print logs before and after the function call, but do not want to modify the definition of the now () function, this way of dynamically adding features during code execution

This article mainly introduces some suggestions for using the Python decorators. The decorators are an important part of Python learning. For more information, see Basic decorator concepts As we all know, the decorator is a well-known design model and is often used in AOP (cross-section programming) scenarios. it is more classic in terms of log insertion, performance testing, and transaction processing, we

Property () and pythonproperty of Python decorators 1. What is a decoration device? Official definition: the decorator is a well-known design model that is often used in scenarios with cut-plane requirements. It is more classic in terms of log insertion, performance testing, and transaction processing. The decorator is an excellent design for solving such problems. With the decorator, we can extract a large number of identical codes irrelevant to the

The following small series will bring you a python ornament (recommended ). I think this is quite good. now I will share it with you and give you a reference. Let's take a look at it with Xiaobian. 1. contains a decorator # Encoding: UTF-8 ############ contains a decorator ######### def outer (func ): def inner (* args, ** kwargs): # to decorate f1 (), use these two parameters to accept any parameter, no matter how many parameters print "1" r = func (* args, ** kwargs) are defined in f1 # func

Learn Python decorators in nine steps This example describes the Python decorator. Share it with you for your reference. The specific analysis is as follows: This is the content introduced in the Python Learning Group. It is a good way to learn and practice more. Step 1: Prepare the simplest function and add additional functions. ? 1 2 3 4 5 6 #-*-Coding: gbk -*- '''Example 1: The simplest function, indicating two calls ''' Def myf

Python decoratorWhat is an adorner? I don't know how to define the adorner.1. 装饰器是函数，因为从代码的层面上来说，它就是开发人员定义的一个函数而已；2. 装饰器就像是类的继承一样，通过装饰符，来实现函数与函数、函数与类之间的"继承"3. 装饰器是种特殊的语法，通过 `@函数名` 或者 `@类名` 来实现函数或类的继承，但是 装饰器不是继承，装饰器装饰的函数会被当做参数传递给装饰器，这个功能又好像 C++中的虚函数，装饰器装饰的函数用来修改装饰器本身的功能来实现额外功能的添加。Example: Man and SupermanPremise: The person-will walk, will speak, Will cry, will laugh, will eat, Superman-will walk, will say, will cry, will laugh, will eat, will flyclass man(object): def __init__(self, f):

Flask-one, flask Installation: 1 pip install FlaskStart the first script: python hello. py access address: http: // 127.0.0.1: 5000. The script is as follows: 1 from flask import Flask2 app = Flask (_ name _) 3 4 @ app. route ('/') # route specifies 5 def hello_world (): 6 return 'Hello worlds summerkxy' 7 if _ name _

I. Configuration Flask-migrateFrom flask.ext.migrate import migrate, migratecommandmigrate = migrate (app,db) #第一个参数是Flask的实例, The second parameter is a SQLAlchemy db instance manager.add_command (' db ', Migratecommand) #manaer is an instance of Flask-script, which is in Flask-script Add a DB command to the Two. Usi

Moment.js is an easy-to-use lightweight JavaScript date processing library that provides features such as date formatting and date resolution. It supports running in two environments, both in the browser and Nodejs. Such libraries can convert any given date into a number of different formats, have powerful date calculations, and have built-in functions that can display a variety of date forms. In addition, it supports multiple languages and you can add a new language pack.Flask-moment is a momen

Learn from an instance ---- FLASK-WTF, instance ---- flask-wtf This case through the implementation of a registration page writing, to take you to understand the use of FLASK-WTF. 　　 The main function is the basic function of the form. The mobile phone number must be 11 digits and cannot be registered through the database. The password must be entered twice and m

definition: The Ask extension encapsulates the SQLAlchemy framework. In Flask-sqlalchemy, the database is specified using a URL, and the following table lists the common database engines and the corresponding URLs. Installation: Pip Install Flask-sqlalchemyPip Install Flask-migrate# Boot filefromFlask_scriptImportManager,server fromFlask_migrateImportmigratecomma

Introduction to the Flask signal mechanism (signals) in the Python Web framework, flasksignals Signal (signals) The Flask signal (signals, or event hooking) allows a specific sender to notify the subscriber of what happened (since we know what happened, we can know what to do next ). Flask provides some signals (core signals) and other extensions provide more si

Excerpt from Parti Chapter3, this chapter mainly talk about the template work principle, here is Jinja2 this template, also mentioned Flask-bootstrap and flask-moment two plug-ins, The former made some encapsulation for flask using bootstrap, while the latter did some encapsulation on moment.js. More content, estimate separate to engage. The meaning of template e

Default location: Description: Most Web applications will provide a CDN-based static file service to give users a better experience, static files mainly include css/js/Pictures/fonts, etc., flask by default only need to create "static" directory under the project root directory, the project uses based on/ The path to the static start can be accessed, but for better processing power, it is recommended to use Nginx or another Web server to manage

87. flask-script component of flask, flaskflask-script The Flask Script extension provides the ability to insert external scripts to Flask, including running a development server, a custom Python shell, setting database scripts, cronjobs, and other command line Tasks running outside of web applications; Separate script