From Creation to Recognition: Mastering QR Code Dynamics with PyQt

Trym Thoren
4 min readDec 17, 2023

In the digital realm, QR codes have become a cornerstone of information exchange. Our previous venture, “Create a Reusable QR Code Generator with PyQt5,” introduced a method to craft these codes. Advancing further, we now turn our focus to the opposite end of this spectrum: interpreting QR codes. Leveraging PyQt6, we embark on building a real-time QR code scanner, weaving a seamless narrative between QR code generation and recognition.

The Evolution from Generating to Decoding QR Codes

Our journey from generating QR codes to decoding them epitomizes the complete lifecycle of QR code interactions, crucial for a holistic understanding of this technology in digital communications.

Recap: QR Code Generation with PyQt5

The QR code generator built with PyQt5 set the foundation:

  • We established the PyQt5 framework, crafting the QRCodeGenerator class for the GUI.
  • The interface included a text field for URL or text input, a generation button, and a display area for the QR code.
  • The generate_qr method harnessed the qrcode library, converting input into a scannable QR code.
# QR Code Generator
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