map() — Advanced Examples

Applies a function to every item in an iterable and returns an iterator

map() protocol implementation

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

python

# map() - implementing the protocol
class Custom:
    def __map__(self):
        return "custom result"

obj = Custom()
print(map(obj))

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

Handling unusual inputs and edge cases.

python

# map() edge cases
print("Edge case handling for map()")

# Type checking
print(type(42))

Knowing these edge cases prevents subtle bugs in production.

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