Decorator using wrapper

decorators_example.py

def trace_decorator(func):
    
    @wraps(func)
    def wrapper(*args, **kwargs):
        # Decorate before
        print('Hello')
        
        # Call function
        result = func(*args, **kwargs)
        
        # Decorate after
        print('Bye')
        
        # Return
        return result
    
    return wrapper

# Use decorator as
@trace_decorator
def fibonacci(n):
    pass