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Why len() Doesn’t Work on Your Python Objects (Until You Do This)

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Why len() Doesn’t Work on Your Python Objects (Until You Do This)

Ever tried using len() on your custom Python class—only to get an error? That’s because Python doesn’t know what “length” means for your object... until you teach it using the __len__ dunder method. In this video, I’ll show you how to implement __len__ to make your custom Python classes work seamlessly with built-in functions like ...

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