I am trying to build a control structure in a class method that takes a function as input and has different behaviors if a function is decorated or not. Any ideas on how you would go about building a function is_decorated that behaves as follows:

def dec(fun):# do decorationdef func(data):# do stuff@dec
def func2(data):# do other stuffdef is_decorated(func):# return True if func has decorator, otherwise Falseis_decorated(func)  # False
is_decorated(func2) # True

Yes, it's relatively easy because functions can have arbitrary attributes added to them, so the decorator function can add one when it does its thing:

def dec(fun):def wrapped(*args, **kwargs):passwrapped.i_am_wrapped = Truereturn wrappeddef func(data):... # do stuff@dec
def func2(data):... # do other stuffdef is_decorated(func):return getattr(func, 'i_am_wrapped', False)print(is_decorated(func))   # -> False
print(is_decorated(func2))  # -> True