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How to retrieve HTML data from Flask

Njoku Ifeanyi Gerald

Overview

Flask is a framework that is widely used to create APIs in Python. It is a simple yet powerful web framework. Flask is designed to help us work efficiently with its ability to scale up to complex applications.

In this shot, we learn how to retrieve HTML data from a Flask application.

Installing dependencies

First, we need to run the commands below to install the required dependencies:

pip install pipenv 
pipenv shell 
pipenv install Flask

Let’s create a file and name it app.py.

We get the HTML input from the Form using the request.form.get() function. We pass the name of HTML input as an argument.

Let’s look at an example:

k38 = request.form.get('kubernetes')
ansible = request.form.get('playbook')

In the code above:

  • request.form.get('kubernetes') takes the input as its parameter. In this case, the input is kubernetes and is stored in a k38 variable.
  • request.form.get('playbook') takes the input as its parameter. In this case, the input is playbook and is stored in the ansible variable.

Code example

from flask import Flask, request, render_template


app = Flask(__name__)

# Creating a route that has both GET and POST request methods
@app.route('/', methods=['GET', 'POST'])
def home():
    if request.method == 'POST':
        name = request.form.get('name')
        username = request.form.get('username')
        
        return f'{name}, your username is {username}'
    return render_template('home.html')


# Initiating the application
if __name__ == '__main__':
    # Running the application and leaving the debug mode ON
    app.run(debug=True)
app.py

Explanation

  • We create a folder and name it templates.

  • Inside the templates folder, we create a file and name it home.html. Then, we add the following code.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="" method="post">
        <label for="name">Name:</label>
        <input type="text" id="name" name="name" placeholder="name">
        <label for="username">Username:</label>
        <input type="text" id="username" name="username" placeholder="username">
        <button type="submit">Submit</button>
    </form>
</body>
</html>
home.html

In our terminal, we run the following command to start the web application:

python app.py
click==8.0.3
colorama==0.4.4
Flask==2.0.2
itsdangerous==2.0.1
Jinja2==3.0.3
MarkupSafe==2.0.1
Werkzeug==2.0.2

RELATED TAGS

python
communitycreator
flask
html

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Njoku Ifeanyi Gerald
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