enumerate() — Advanced Examples

Adds a counter to an iterable, yielding (index, value) pairs

EasyIntermediateAdvancedExpert

enumerate() protocol implementation

Implementing the protocol that enumerate() uses under the hood.

python
# enumerate() - implementing the protocol
class Custom:
    def __enumerate__(self):
        return "custom result"

obj = Custom()
print(enumerate(obj))

Understanding the dunder methods that enumerate() calls helps you customize behavior for your own classes.

Edge cases with enumerate()

Handling unusual inputs and edge cases.

python
# enumerate() edge cases
print("Edge case handling for enumerate()")

# Type checking
print(type(42))

Knowing these edge cases prevents subtle bugs in production.

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