看一段代码
其中第5行是一个generator expression,第7行是一个list expression.
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[root@cdn ~]# python
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Python 2.6.6 (r266:84292, Jan 21 2013, 17:47:21)
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[GCC 4.1.2 20080704 (Red Hat 4.1.2-51)] on linux2
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Type "help", "copyright", "credits" or "license" for more information.
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>>> (x*2 for x in range(5))
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<generator object <genexpr> at 0x2b06b7b144b0>
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>>> [x*2 for x in range(5)]
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[0, 2, 4, 6, 8]
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>>>
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