Quick Answer
A decorator wraps a function: def my_decorator(func): def wrapper(*args, **kwargs): # before; result = func(*args, **kwargs); # after; return result; return wrapper. Apply with @my_decorator. Decorators with arguments need an extra level of nesting. Class decorators work on classes. functools.wraps preserves metadata. Built-in decorators: @property, @staticmethod, @classmethod, @functools.lru_cache.
Answer
Decorators modify behavior of functions or classes. Can be parameterized. Used for logging, caching, auth, timing. Use @decorator syntax.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
