Program In Flask

Install Flask and create simple “Hello World”application

1- Hello World program

For create “Hello world” program follow the below steps:

  • Create two folder one “development”and inside “flask”folder.
  • Open your “command prompt”.
  • Give command: cd development.
  • Give command: cd flask.
  • Create virtualenv “venv” name.
  • Give command : virtualenv venv.
  • Activate virtualenv.
  • Give command : dir
  • Give command: “venv\scripts\activate”(virtualenv activate).
  • Give command: python(check its working).
  • Give command: exit.
  • Install Flask: pip install flask.

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  • Download subline any one like :-visualstudio.
  • https://code.visualstudio.com/
  • After that open your “development” folder in visual studio.
  • create a file “class.py” in subline.
  • Run “class.py” in command prompt
  • Give command: ls(it shows all the file in flask folder)
  • Give command : python class.py

Working with model views templates:

MVC and MVT

MVC:-

Model – Model represents an object or JAVA POJO carrying data. It can also have logic to update controller if its data changes. View – View represents the visualization of the data that model contains. Controller – Controller acts on both model and view. It controls the data flow into model object and updates the view whenever data changes. It keeps view and model separate.

MVT:-

The MVT (Model View Template) is a software design pattern. It is a collection of three important components’ Model’ ‘ View’ and ‘Template’. The Model helps to handle database. It is a data access layer which handles the data. The Template is a presentation layer which handles User Interface part completely. The View is used to execute the business logic and interact with a model to carry data and renders a template.

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