Share Python text to generate a QR code instance,

Share Python text to generate a QR code instance,

This article provides an example of how to generate a QR code in Python text for your reference. The details are as follows:

Test 1:Generate a QR code image with white background and black characters
Test 2:Generate a QR code image with a logo

# Coding: UTF-8 ''' Python generates a QR code v1.0. Generate a text QR code. Image Test 1: generate a text with a white background and a black text QR code. Image Test 2: generate a QR code image ''' _ author _ = 'xue 'import qrcodefrom PIL import Imageimport OS # generate a QR code image def make_qr (str, save ): qr = qrcode. QRCode (version = 4, # the size of the generated QR code is 1-40*21 (21 + (n-1) * 4) error_correction = qrcode. constants. ERROR_CORRECT_M, # L: 7% M: 15% Q: 25% H: 30% box_size = 10, # The pixel size of each grid is border = 2, # The grid width of the border) qr. add_data (str) qr. make (fit = True) img = qr. make_image () img. save (save) # generate a qr code image with a logo def make_logo_qr (str, logo, save): # configure the parameter qr = qrcode. QRCode (version = 4, error_correction = qrcode. constants. ERROR_CORRECT_Q, box_size = 8, border = 2) # Add the conversion content qr. add_data (str) # qr. make (fit = True) # generate qr code img = qr. make_image () # img = img. convert ("RGBA") # Add the logo if logo and OS. path. exists (logo): icon = Image. open (logo) # Get the size of the QR code image img_w, img_h = img. size factor = 4 size_w = int (img_w/factor) size_h = int (img_h/factor) # The size of the logo image cannot exceed 1/4 icon_w, icon_h = icon. size if icon_w> size_w: icon_w = size_w if icon_h> size_h: icon_h = size_h icon = icon. resize (icon_w, icon_h), Image. ANTIALIAS) # Calculate the position of the logo in the QR code graph w = int (img_w-icon_w)/2) h = int (img_h-icon_h)/2) icon = icon. convert ("RGBA") img. paste (icon, (w, h), icon) # Save the processed image img. save (save) if _ name __= = '_ main __': save_path+'theqrcode.png '# Save the generated file logo='logo.jpg' # logo image str = raw_input ('Enter the text content of the QR code to be generated: ') # make_qr (str) make_logo_qr (str, logo, save_path)

How does Python use the QRCode module to generate a QR code?

1. Introduction
Python-qrcode is a third-party module used to generate QR code images. It depends on the PIL module and qrcode library.
2. Simple usage

import qrcode img = qrcode.make('hello, qrcode')img.save('test.png')

3. Advanced usage

import qrcode qr = qrcode.QRCode(     version=1,     error_correction=qrcode.constants.ERROR_CORRECT_L,     box_size=10,     border=4, ) qr.add_data('hello, qrcode') qr.make(fit=True) img = qr.make_image()img.save('123.png')

4. Parameter meaning:

Version: The value ranges from 1 ~ The integer of 40, which controls the size of the QR code (the minimum value is 1, which is a 12 × 12 matrix ). If you want the program to determine automatically, set the value to None and use the fit parameter.

Error_correction: controls the error correction function of the QR code. You can set the following four constants.
ERROR_CORRECT_L: errors of about 7% or fewer can be corrected.
ERROR_CORRECT_M (default): errors of about 15% or fewer can be corrected.
ROR_CORRECT_H: errors of about 30% or fewer can be corrected.

Box_size: controls the number of workers contained in each small grid in the QR code.

Border: number of cells contained in the control border (the distance between the QR code and the Image Boundary) (default value: 4, which is the minimum value specified by relevant standards)

I hope this article will help you learn Python programming.

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