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其他语言中，比如C＃，我们通常遍历数组是的方法是：
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for (int i = 0; i < list.Length; i++)
{
//todo with list[i]
}</div>
在Python中，我们习惯这样遍历：
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-->for item in sequence:
process(item)</div>
这样遍历取不到item的序号i，所有就有了下面的遍历方法：
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-->for index in range(len(sequence)):
process(sequence[index])</div>
其实，如果你了解内置的enumerate函数，还可以这样写：
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-->for index, item in enumerate(sequence):
process(index, item)</div>
</div>
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-->
for (int i = 0; i < list.Length; i++){ //todo with list[i]}</div>在Python中，我们习惯这样遍历：
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-->
for item in sequence: process(item)</div>这样遍历取不到item的序号i，所有就有了下面的遍历方法：
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-->
for index in range(len(sequence)): process(sequence[index])</div>其实，如果你了解内置的enumerate函数，还可以这样写：
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-->
for index, item in enumerate(sequence): process(index, item)</div>
</div>