Table of contents
(1) Find and install the third-party library qrcode
(2) Write code and embed built-in information
(3) Use the scanning tool to read the information
——By Author: Xinxiao·Old Knowing
My CSDN blog address link:
1. Question guidance
The application of QR codes brings great convenience to people's lives. However, how is the QR code generated?
A QR code essentially uses a black and white dot matrix to represent a character string, and transmits the information in the form of an image through some conversion rules. However, the QR code in life is more of a URL (web address). After scanning the code, it will automatically jump to the corresponding address, thus opening a web page. So how do we use Python to custom generate a simple QR code?
2. Implementation steps
(1) Find and install the third-party library qrcode
Here we need to use Python's third-party library. First, log in to the pypi official website to find the qrcode documentation library.
Official website link: PyPI · The Python Package Index
Note: Here is the installation on the command line!
Tips for successful installation:
(2) Write code and embed built-in information
import qrcode img = qrcode.make('Hello,World!') #这里添加需要添加的URL或文本等 img.save('qrcode.png')(3) Use the scanning tool to read the information
Use WeChat, Baidu and other apps to scan the code to read: Use WeChat or other tools to scan the code to see the content of the QR code.
illustrate:
The use of Python here is just to customize the generation of simple QR codes, and generate more rich QR codes (for example: dynamic QR codes, colored QR codes, etc. If you are interested, you can refer to the online tutorial for learning).