By Joel Perras
Flask is a small yet strong net improvement framework for Python. even though Flask is called a micro-framework, it really is no method missing in performance; there are various extensions to be had to Flask which is helping it to operate on the comparable point as different huge frameworks corresponding to Django and Ruby on Rails.
This booklet will show tips to increase a sequence of internet program tasks with the Python net micro-framework, and leverage extensions and exterior Python libraries and APIs to increase the advance of numerous higher and extra advanced internet applications.
The ebook will commence by way of explaining Python’s Virtualenv library and the way to create and turn among a number of digital environments. You’ll first construct an SQL database-backed program, as a way to use Flask-WTF, Flask-SQLAlchemy, Jinja templates, and different tools. subsequent you’ll movement directly to a timeline software, equipped utilizing recommendations together with pytest-Flask, the Blinker package deal, info modelling for person timelines, exception dealing with, and growing and organizing CLI instruments.
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Flask is a small yet strong net improvement framework for Python. notwithstanding Flask is called a micro-framework, it truly is no approach missing in performance; there are lots of extensions on hand to Flask which is helping it to operate on the related point as different huge frameworks resembling Django and Ruby on Rails.
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Additional info for Flask Blueprints
String(60)) # The date/time that the user account was created on. id) [ 30 ] Chapter 3 The is_authenticated, is_active, is_anonymous, and get_id methods may seem arbitrary at the moment but are required for the next step, which will be installing and setting up the Flask-Login extension in order to help us manage our user authentication system. Flask-Login and Flask-Bcrypt for authentication As we've done several times already with other libraries, we will install the extensions in our current project's virtual environment: $ (snap) pip install flask-login flask-bcrypt The first is a Flask-specific library to normalize much of the standard user login process that nearly every web application requires, and the latter will allow us to ensure that the user passwords we store in our database are hashed using an industry standard algorithm.
The values of these attributes are StringField and PasswordField, each with their own set of validators to indicate that the form data of both fields is required to be non-empty and the password field itself should be at least six characters long in order to be considered valid. html, using the Jinja2 templating language. html is required when using Blueprints due to the manner in which the default template loader searches the registered template paths; it allows for some relatively simple overriding of blueprint templates in your main application template folder at the cost of some additional file tree complexity.
From module to package The simplest structural change that can be applied to a module-based Flask application is to transform it into a typical Python package, with special accommodation for the static and templates folders. py. py file is required for a folder to be considered a valid Python package. One detail that should be handled at this point is the code that is used to run the development server. py * Running on http://localhost:5000/ For a variety of reasons, this is no longer a viable option.
Flask Blueprints by Joel Perras