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QR Code Generator with Python

November 7, 2022
Posted by: Code and Debug
Category: Mini Python Project Project

In this blog, we will learn how to generate QR Code using Python with help of qrcode module.

What is a QR Code?

Often when transacting with digital wallets, we scan the QR Code. Not just any code, QR Code is able to speed up and simplify the transaction process. The existence of a QR Code supports cardless transactions which are now echoed everywhere. Exactly what is a QR Code and how does it work?

QR Code is a matrix code or two-dimensional barcode derived from the word “Quick Response”, where the contents of the code can be deciphered quickly and precisely.

Steps to install qrcode module

Install qrcode library

				
					pip install qrcode

Import qrcode

				
					import qrcode

Basic Usage

Refer the code below to generate a basic QR Code.

				
					import qrcode

img = qrcode.make("https://codeanddebug.in")
img.save("myQRcode.png")

A file with name myQRcode.png will be generated within the same folder.

Some more usage of qrcode module

Above, we created a QR code in its default form with default parameters, now we will try to give color, box size, border and more to our QR code.

				
					import qrcode

qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=15, border=2)
qr.add_data('https://codeanddebug.in')
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="purple")
img.save("myQRcode2.png")

ERROR_CORRECT_L: up to 7% or less errors can be corrected.
ERROR_CORRECT_M: up to 15% or less errors can be corrected.
ERROR_CORRECT_Q: up to 25% or less errors can be corrected.
ERROR_CORRECT_H: up to 30% or less errors can be corrected.

A file with name myQRcode2.png will be generated within the same folder.

Adding round style to QR Code

We can style our QR Code using the StyledPilImage submodule.

				
					import qrcode
from qrcode.image.styledpil import StyledPilImage
from qrcode.image.styles.moduledrawers import RoundedModuleDrawer

qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=15, border=2)
qr.add_data('https://codeanddebug.in')
qr.make(fit=True)
img = qr.make_image(image_factory= StyledPilImage, module_drawer=RoundedModuleDrawer())
img.save("myQRcode3.png")

A file with name myQRcode3.png will be generated within the same folder.

Adding gradient style to QR Code

We can style our QR Code using the RadialGradiantColorMask submodule.

				
					import qrcode
from qrcode.image.styles.colormasks import RadialGradiantColorMask

qr = qrcode.QRCode(error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=15, border=2)
qr.add_data('https://codeanddebug.in')
qr.make(fit=True)
img = qr.make_image(image_factory= StyledPilImage, color_mask=RadialGradiantColorMask())
img.save("myQRcode4.png")

A file with name myQRcode4.png will be generated within the same folder.