Building Web Applications with Flask by Italo Maia

By Italo Maia

Use Python and Flask to construct remarkable net purposes, simply how you wish them!

About This Book

  • Learn easy methods to use types, authentication, and authorization keep an eye on via extensions, and supply a strong, secure net adventure for the client
  • Free your self from the SQL vs NoSQL paradigm and use the expertise that most closely fits your needs
  • Add robust ideas like TDD and BDD on your variety of checking out skills

Who This booklet Is For

If you're a Python net developer who desires to research extra approximately constructing purposes in Flask and scaling them with industry-standard practices, this can be the ebook for you.

What you'll Learn

  • Create unmarried web page purposes with Flask
  • Use macros, filters, tags, and regulate buildings to render wealthy responses to person requests
  • Receive types securely via form-based periods and WTForms
  • Utilize NoSQL or SQL databases to shop consumer facts seamlessly
  • Generate easy, but strong, relaxation companies 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 facility of extensions to construct powerful authorization and permission policies

In Detail

Flask is a strong net framework that is helping you construct nice initiatives utilizing your favourite instruments. Flask takes the versatile Python programming language and offers an easy template for net improvement. as soon as imported into Python, Flask can be utilized to avoid wasting time development net purposes. It is going opposed to the move with the microframework thought, 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 intricate ones once possible.

From the start, development internet purposes with Flask exhibits you ways to make use of Flask's options, extensions, and parts to create attractive, full-featured internet initiatives. you are going to tips on how to adequately deal with types utilizing WTForms, devise handy templates with Jinja2 tags and macros, use NoSQL and SQL databases to shop consumer information, try out your tasks with gains and unit assessments, create strong authentication and person authorization, in addition to administrative interfaces comfortably, and more.

As Flask doesn't implement an architectural recipe, neither can we! This e-book makes no coding assumptions on the way you should still code, leaving you unfastened to experiment.

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Extra resources for Building Web Applications with Flask

Example text

This tool allows you to process a constant or variable before printing it to the template. The goal is to implement the formatting you want, strictly in the template. To use a filter, just call it using the pipe operator like this: {% set name = 'junior' %} {{ name|capitalize }} {# output is Junior #} [ 23 ] Man, Do I Like Templates! Its name is passed to the capitalize filter that processes it and returns the capitalized value. To inform arguments to the filter, just call it like a function, like this: {{ ['Adam', 'West']|join(' ') }} {# output is Adam West #} The join filter will join all values from the passed iterable, putting the provided argument between them.

Create a calculator with the four operations. It should have all the numbers and operators for the user to click on. ) and complains if the user tries something evil, such as dividing 0 by 0. Summary So much learned... What can I say! No harm trying, right? Well, we have seen how to write HTML forms; read forms with Flask; write WTForms forms; validate form data with plain Python and form validators; and write custom validators. We also saw how to use Flask-WTF to write and validate our forms and how to protect our applications against CSRF attacks.

If it is not, show the user an error message. Otherwise, congratulate the user and show a new image. Use Flask-WTF. Create a calculator with the four operations. It should have all the numbers and operators for the user to click on. ) and complains if the user tries something evil, such as dividing 0 by 0. Summary So much learned... What can I say! No harm trying, right? Well, we have seen how to write HTML forms; read forms with Flask; write WTForms forms; validate form data with plain Python and form validators; and write custom validators.

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