Raspberry Pi - Camera Module
Why does the pyzbar.decode() function return a list of decoded objects instead of a single decoded string when reading QR codes on Raspberry Pi?
Why does the pyzbar.decode() function return a list of decoded objects instead of a single decoded string when reading QR codes on Raspberry Pi?
hard🧠 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand QR code images can have multiple codes
Images may contain more than one QR code, so decode() returns all found codes.Step 2: Reason why output is a list
Returning a list allows handling multiple decoded QR codes separately.Final Answer:
Because an image can contain multiple QR codes, each decoded separately -> Option BQuick Check:
Multiple QR codes = decode returns list [OK]
Quick Trick: decode() returns list to handle multiple QR codes in one image [OK]
Common Mistakes:
MISTAKES- Thinking decode returns only one code always
- Confusing list output with bytes output
- Assuming decode requires list input
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