Day_4_Class_vs_Instance.py

class Person:
    def __init__(self, initialAge):
        if initialAge < 0:
            age = 0
            print('Age is not valid, setting age to 0.')

    def amIOld(self):
        if age < 13:
            print("You are young.")
        elif age >= 13 and age < 18:
            print("You are a teenager.")
        else:
            print("You are old.")
        
    def yearPasses(self):  
        global age
        age += 1

t = int(input())
for i in range(0, t):
    age = int(input())         
    p = Person(age)  
    p.amIOld()
    for j in range(0, 3):
        p.yearPasses()       
    p.amIOld()
    print("")