Gain insights into developing web applications using Flask, a lightweight and easy-to-learn Python framework. Delve into techniques that make you a sought-after full-stack developer.

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This project-based course is a detailed guide to web application development using the increasingly popular Flask framework.

Flask is known for being simple, lightweight and having a small learning curve. If you've got some experience in Python, picking up Flask will be a breeze. It's got a booming job market and will put you on track to becoming an in-demand full-stack developer. What's not to love?

Flask: Develop Web Applications in Python

# What are static files?
Static files, or assets, are the files that the server sends to the clients *"as-it-is"*, i.e., without any intervention. For example, any **`CSS`** files, background **images**, or `JavaScript` files that we might have on our website are sent to the client without modification. 
# Steps to Serve Static Files
The following steps need to be taken to host a static asset. 
## Create a `\static` directory


First, similar to the templates, we need to create a directory called `\static` in our project for `Flask` to recognize it. The *same file structure strategies* that apply to the *templates* will also apply here.


## Create a URL for static files

In the case of a template, we create the `URL` through the views and the routes associated with them. However, we do not use views for static files. So, to create a separate `URL` for them, we use the `url_for()` function.


### `url_for()` function
The `url_for()` function is used to build a `URL` for a certain endpoint. We can use it to build `URL`s for view functions as well. It takes the name of the endpoint and any associated variables as arguments. 
**For example:**
The following line will generate the `URL` for the defined view. 
``` 
url_for('view_function_name', variable_name = 'value_of_variable')
```
> 💡 **Why do we need to use `url_for()` when we can hardcode the `URL`?**
> 1. The `url_for()` function always returns the absolute `URL` for the endpoint. Thus, we call it anywhere in the project, and we will not have issues with relative paths.
> 2. If we end up changing the path for an endpoint or the route for a view, we do not have to change the hardcoded `URL` in the whole project.


The `URL` for a static file can be created using the `static` endpoint as following:
```
url_for('static', filename = 'name_of_file')
```

# Example application

In this lesson, we will study how we can host the static files present in our Flask application.

Before Getting Started

Introduction to Flask

First Flask Application

Build File/Directory Explorer in Flask

Static Templates

Static Files

Dynamic Templates

Form Handling

Database

Operations on Models

Conclusion

Test a MEAN Stack Todo Application with JEST

Build an E-Learning Website Using Flask

How Do We Serve Static Files?

What are static files?