Building Web Applications with Flask by Italo Maia

By Italo Maia

Use Python and Flask to construct impressive internet purposes, simply how you wish them!

About This Book

  • Learn the way to use varieties, authentication, and authorization keep an eye on via extensions, and supply a strong, secure net event for the client
  • Free your self from the SQL vs NoSQL paradigm and use the know-how that most closely fits your needs
  • Add robust innovations like TDD and BDD for your diversity of checking out skills

Who This publication Is For

If you're a Python internet developer who desires to study extra approximately constructing functions in Flask and scaling them with industry-standard practices, this can be the e-book for you.

What you'll Learn

  • Create unmarried web page purposes with Flask
  • Use macros, filters, tags, and regulate constructions to render wealthy responses to consumer requests
  • Receive kinds securely via form-based periods and WTForms
  • Utilize NoSQL or SQL databases to shop consumer facts seamlessly
  • Generate basic, but robust, leisure prone out of your info models
  • Learn how you can practice test-driven and behavior-driven advancements on your Flask projects
  • Use Flask parts to create maintainable non-flat projects
  • Harvest the ability of extensions to construct strong authorization and permission policies

In Detail

Flask is a robust net framework that is helping you construct nice tasks utilizing your favourite instruments. Flask takes the versatile Python programming language and gives an easy template for internet improvement. as soon as imported into Python, Flask can be utilized to save lots of time development internet functions. It is going opposed to the circulate with the microframework inspiration, leaving many of the structure offerings to the developer. via its nice API, extensions, and strong styles, Flask is helping you create easy tasks in mins and complicated ones once possible.

From the start, development net functions with Flask exhibits you ways to make use of Flask's options, extensions, and parts to create attractive, full-featured internet initiatives. you will how to safely deal with varieties utilizing WTForms, devise handy templates with Jinja2 tags and macros, use NoSQL and SQL databases to shop person information, try out your tasks with positive factors and unit exams, create robust authentication and person authorization, in addition to administrative interfaces comfortably, and more.

As Flask doesn't implement an architectural recipe, neither will we! This booklet makes no coding assumptions on the way you may still code, leaving you loose to experiment.

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A last delimiter you should know is {# comments go here #}. It is a multi-line delimiter used to declare comments. Let's see two examples that have the same result: {# first example #} {# second example #} Both comment delimiters hide the content between {# and #}. As can been seen, this delimiter works for one-line comments and multi-line comments, what makes it very convenient. Control structures We have a nice set of built-in control structures defined by default in Jinja2. Let's begin our studies on it with the if statement.

Block and extends always work together. The first is used to define "overwritable" blocks in a template, while the second defines a parent template that has blocks, for the current template. txt{% endblock %} =========== I am a powerful psychic and will tell you your past {#- "past" is the block identifier #} {% block past %} You had pimples by the age of 12. txt #} {% block past %} You've bought an ebook recently. txt? txt is a simple template with two block statements, called template and past.

Each column has a specific type, and accepts only that type as input data. You may think of it as an abstraction of a class model attribute. Transactions are how you group the operations you want to be executed together. It is used mainly to achieve atomicity. This way, no operations are done halfway. Primary key is a database concept where part of a record's data is used to identify the given record across the database table. It is usually implemented by the database through constraints. [ 40 ] Chapter 5 Foreign key is a database concept where a set of data is used to identify a given record across tables.

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