'''
    Decorator що рахує кількість екземплярів


def decor_cl(cl):
    count = 0
    class Wrapper:
        def __init__(self, *args):
            print(args)
            nonlocal count
            count += 1
            print("%%", count) #print in file
            self.wrapper = cl(*args)
        def __getattr__(self, item):
            return getattr(self.wrapper, item)
    return Wrapper

    # def __get__(self, instance, owner):
    #     return instance

def main_func(classobj):
    return decor_cl(classobj)

C = main_func(C)

'''

##############################################

'''
Змінює формат доступу до атрибуту

class A:
    attr1 = None
    def __init__(self):
        self.attr1 = 6
        pass

def attrsetter(self, value):
    self.attr1 = value

def attrgetter(self, name):
    return self.attr1


def func(cl, attrname):
    setattr(cl, attrname, property(fset=attrsetter, fget=attrgetter))

func(A, 'attr')
'''

################################

'''
Знайти усі дискриптори класу

def isdescriptor(cls):
    names = ["__get__", "__set__", "__delete__"]
    for name, obj in inspect.getmembers(cls):
        if name in names:
            return True
    return False

def get_descriptors():
    descriptors = list()
    for name, obj in inspect.getmembers(sys.modules[__name__]):
        if inspect.isclass(obj) and isdescriptor(obj):
            descriptors.append(obj)
    return descriptors

descriptors = get_descriptors()

def foo(cls):
    for name in cls.__dict__:
        for descr in descriptors:
            if isinstance(cls.__dict__[name], descr):
                print("descr", name)

foo(A)
'''