两个变量值互换。
#!/usr/bin/python# -*- coding: UTF-8 -*-def exchange(a,b):a,b = b,areturn (a,b)if __name__ == '__main__':x = 10y = 20print 'x = %d,y = %d' % (x,y)x,y = exchange(x,y)
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#!/usr/bin/python
# -*- coding: UTF-8 -*-
def exchange(a,b):
a,b = b,a
return (a,b)
if __name__ == '__main__':
x = 10
y = 20
print 'x = %d,y = %d' % (x,y)
x,y = exchange(x,y)
print 'x = %d,y = %d' % (x,y)
以上实例输出结果为：
x = 10,y = 20 x = 20,y = 10
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