By Shalabh Aggarwal
Over eighty hands-on recipes that will help you create small-to-large net functions utilizing Flask
About This Book
- Get the main out of the strong Flask framework whereas ultimate versatile along with your layout choices
- Build end-to-end internet functions, correct from their set up to the post-deployment stages
- Packed with recipes containing plenty of pattern functions that will help you comprehend the intricacies of the code
Who This e-book Is For
If you're a internet developer who desires to examine extra approximately constructing functions in Flask and scale them with industry-standard practices, this is often the booklet for you. This e-book also will act as a great tool while you are conscious of Flask's significant extensions and wish to make the easiest use of them.
It is believed that you've wisdom of Python and a easy figuring out of Flask. while you are thoroughly new to Flask, studying the ebook from the 1st bankruptcy and going ahead might help in getting accustomed to Flask as you pass ahead.
Flask Framework Cookbook takes you thru a couple of recipes that can assist you comprehend the facility of Flask and its extensions. you are going to commence via seeing the various methods of configurations Flask software could make use of. you'll how one can paintings with templates and find out about the ORM and look at layers. you'll discover the right way to write an admin interface via the debugging and logging of mistakes. ultimately, you'll find out about diversified deployment and post-deployment ideas on systems comparable to Apache, twister, and Heroku.
By the tip of this publication, you might have received all of the wisdom required to jot down Flask functions within the very best means, and scale them with most sensible practices.
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Approximately This Book
• Simplify layout trend implementation utilizing the facility of Python
• every one trend is followed with a real-world instance demonstrating its key features
• this can be an easy-to-follow consultant targeting the sensible elements of Python layout patterns
Who This booklet Is For
This e-book is for Python programmers with an intermediate historical past and an curiosity in layout styles carried out in idiomatic Python. Programmers of different languages who're drawn to Python may also reap the benefits of this e-book, however it will be higher in the event that they first learn a few introductory fabrics that specify how issues are performed in Python.
What you'll Learn
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• Clone gadgets utilizing the Prototype pattern
• Make incompatible interfaces appropriate utilizing the Adapter pattern
• safe an interface utilizing the Proxy pattern
• opt for an set of rules dynamically utilizing the method pattern
• expand an item with no subclassing utilizing the Decorator pattern
• continue the common sense decoupled from the UI utilizing the MVC pattern
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Extra info for Flask Framework Cookbook
The following code shows what such a config looks like if we modify the code for our catalog application. py is because now we are using the Flask script manager to handle the running of our application. The script manager also provides extra command-line arguments as specified. In this example, we will have db as a command-line argument. Model): # ... # Same product model as last recipe # ... migration] Context impl SQLiteImpl. migration] Will assume non-transactional DDL. py ... done In the preceding code, we can see that Alembic compares the new model with the database table and detects a newly added column for company in the product table (created by the Product model).
Js is shown in the following code. js in our application, the best way will be to write a wrapper in Python and use it via jinja2 environment variables. js methods as we want to parse to the preceding class as and when needed. com/ 37 3 Data Modeling in Flask This chapter covers one of the most important parts of any application, that is, the interaction with database systems. This chapter will take us through how Flask can connect to database systems, define models, and query the databases for retrieval and feeding of data.
Let's do this by modifying some files from the preceding application. We will make modifications to both models and views. In models, we will add a Category model, and in views, we will add new methods to handle category-related calls and also modify the existing methods to accommodate the newly added feature. id 46 Chapter 3 In the preceding Product model, notice the newly added fields for category_id and category. The category_id field is the foreign key to the Category model, and category represents the relationship table.