hasattr() — Advanced Examples

Returns True if an object has the given named attribute

hasattr() protocol implementation

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

python

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

obj = Custom()
print(hasattr(obj))

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

Handling unusual inputs and edge cases.

python

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

# Type checking
print(type(42))

Knowing these edge cases prevents subtle bugs in production.

Want to try these examples interactively?