!/usr/bin/env python

coding: utf-8

class Person:
def __init__(self,name,sex,age):

  self.name = name
  self.sex = sex
  self.age = age 

# def level(self):
# print('coding')
def level(self):

   age = self.age
   if 60 <= age <=150
           print 'old'
   elif 20<= age <60
           print 'adult'
   elif 0<= age <20
          print 'child'
    else:
           print  '输入有误'

zby = Person('zby','male',25)