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#!/usr/bin/python

#coding:utf-8

# 元组 其内容是不可变的

u = 1,2,3; # 定义

print u;

print len(u);

b = 1, 3, (3, 5); # 可嵌套

print b;

# 序列拆封

a = 3;

b = 4;

a, b = (b,a);

print a, b;

def triple(x, y, z):

return (3 * x, 3 * y, 3 * z);

a, b, c = triple(1, 2, 3);

print a, b, c; #3, 6, 9

a, b, c = 1, 2, 3;

print a, b, c; #1, 2, 3