Python decorator? - can someone please explain this?

Question

Apologies this is a very broad question.

The code below is a fragment of something found on the web. The key thing I am interested in is the line beginning @protect

Answer 1

Decorator is just a function that takes another function as an argument

Simple Example:

def get_function_name_dec(func):
  def wrapper(*arg):
      function_returns = func(*arg)  # What our function returns
      return func.__name__ + ": " + function_returns

  return wrapper

@get_function_name_dec
def hello_world():
    return "Hi"

print(hello_world())