Til_Ulenspiegel

class Counter: 
    def __init__(self, number=5, lower_limit=3, upper_limit=10): 
        assert lower_limit <= number <= upper_limit
        self.count = [*range(1, number+1)]
        self.lower_limit = lower_limit
        self.upper_limit = upper_limit  
        
    def increase_count(self):
        if len(self.count) == self.upper_limit: 
            raise ValueError("upper_limit is reached")
        self.count.append(self.count[-1] +1) 
        return self.count
           
    def decrease_count(self): 
        if len(self.count) == self.lower_limit: 
            raise ValueError("lower_limit is reached")
        self.count.pop()
        return self.count
            
            
obj = Counter() 
print(obj.increase_count())
print(obj.increase_count())
print(obj.increase_count())
print(obj.decrease_count())
print(obj.decrease_count())