# -*- coding: utf-8 -*-
"""
Created on Tue Dec 19 16:04:57 2017
元组（truple）-数据结构
@author: Administrator
"""

import os 

tup1 = ('physics', 'chemistry', 1997, 20.3)

print(tup1[0])
tup2 = ()    #创建空元组：

tup3 = (50)   # 不加逗号，类型为整型变量
tup4 = (50,)  # 加上逗号，类型为元组
print('hello')