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python元组操作实例解析

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Release： 2016-06-06 11:32:58
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本文实例讲述了python元组操作方法，分享给大家供大家参考。具体分析如下：

一般来说，python的函数用法挺灵活的，和c、php的用法不太一样，和js倒是挺像的。

在照着操作时，可以发现一个很神奇的现象：

>>> t = (1, 3, 'b')
>>> q = t + ((3, 'abc'))
>>> q
(1, 3, 'b', 3, 'abc')
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这里我预料的应该是(1, 3, 'b', (3, 'abc'))，但是结果却是(1, 3, 'b', 3, 'abc')，刚开始我猜测python是把所有的元素都提取出来重新按原顺序组合。然后我又试了一下：

>>> q = t + ((3, 'abc'), '3')
>>> q
(1, 3, 'b', (3, 'abc'), '3')
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看来猜测错了，那为什么q = t + ((3, 'abc'))就把元组拆分了呢，我又试了一下：

>>> q = t + ((3, 'abc', ('a')))
>>> q
(1, 3, 'b', 3, 'abc', 'a')
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python又把元素里的元组里的('a')去掉了()，为了验证我的想法，我进一步测试：

>>> q = t + ((3, 'abc', ('a', 'ab')))
>>> q
(1, 3, 'b', 3, 'abc', ('a', 'ab'))
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看来结果已经很明了了，在对元组进行+操作时，python会自动对被加的元组进行解析，在保持原元组结构的前提下，把它解析成最简单的元组进行相加，即把只有单一元素的多重元组去括号。
那么，如果我不想让python在+操作时把()去掉呢，那么这样操作就行了：

>>> q = t + ((3, 'abc'),)
>>> q
(1, 3, 'b', (3, 'abc'))
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希望本文所述对大家Python程序设计的学习有所帮助。

Related labels：
python tuple operate
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