class Window(object):
        def __init__(self, minimum, maximum):
            self.min_func = min
            self.max_func = max
            self.tuple_type = tuple
            self.minimum = minimum
            self.maximum = maximum
            self.minimum, self.maximum = self.tuple_type([self.min_func(*self.tuple_type([self.minimum, self.maximum])), self.max_func(*self.tuple_type([self.minimum, self.maximum]))])
    
        def __call__(self, x):
            self.x = x
            result = self.minimum <= self.x <= self.maximum
            del self.x
            return result