Generating QR Codes with Python and the qrcode Library

 

ASSLAM.U.ALIKUM

Introduction:

QR codes have become increasingly popular in recent years due to their ability to store a large amount of information in a small, square matrix. These codes can be scanned by smartphones and other devices, providing a convenient way to share data such as URLs, contact information, and more. In this article, we will explore how to generate QR codes using Python and the qrcode library.

QR Code Generation with qrcode Library:

Python provides several libraries for generating QR codes, and one of the most popular options is the qrcode library. It offers a simple and straightforward way to create QR codes with customizable options.

Generating a QR Code:

To generate a QR code you need to have the qrcode library installed. You can install it using pip:

pip install qrcode

The code to generate QR code image :

import qrcode def generate_qr_code(data, filename): qr__code = qrcode.QRCode( version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=10, border=4, ) qr__code.add_data(data) qr__code.make(fit=True) qr_img = qr__code.make_image(fill_color="black", back_color="white") qr_img.save(filename) generate_qr_code("https://codewithsharaft.blogspot.com", "qr_code-1.png") print('Image creation is completed successfully ')

output:

Code explanation:

In the code above, we import the qrcode module, which provides the necessary functionality for generating QR codes. The generate_qr_code function takes two arguments: data, which represents the information to be encoded in the QR code, and filename, which specifies the name of the output image file.

 

The qrcode.QRCode class is instantiated with specific parameters:

 

• version: This parameter controls the size of the QR code. Higher values result in larger QR codes with more data capacity. In the code snippet, we set it to 1, which represents the smallest version.
• error_correction: QR codes can handle varying levels of damage and errors. We set the error correction level to ERROR_CORRECT_L, which provides the lowest level of error correction.
• box_size: This parameter determines the size of each box (or "module") in the QR code. In this case, we set it to 10 pixels.
• border: The border parameter defines the width of the white border around the QR code. A value of 4 means there will be four modules of white space around the QR code.

Next, we add the data to be encoded using the add_data method of the qr_code object. In this case, we pass the data argument provided to the generate_qr_code function.

After adding the data, we call the make method with fit=True to automatically adjust the size of the QR code to fit the data.

 The next line creates the actual QR code image by calling the make_image method on the qr_code object. We specify the fill color as black and the background color as white. 

Finally, we save the generated QR code image to the specified filename using the save method.

Conclusion: 

In this article, we explored how to generate QR codes using Python and the qrcode library. We discussed the code