Pythonでのクラス定義.py

class Person:
    def __init__(self,initialAge):
        # Add some more code to run some checks on initialAge
        if initialAge < 0:
            print "Age is not valid, setting age to 0."
            self.age = 0
        else:
            self.age = initialAge
    def amIOld(self):
        # Do some computations in here and print out the correct statement to the console
        if(self.age < 13):
            print "You are young."
        elif(self.age < 18):
            print "You are a teenager."
        else:
            print "You are old."
            
    def yearPasses(self):
        # Increment the age of the person in here      
        self.age += 1

使うとき

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

newとは書かないのね