about python list step issue when the element is long type

In [2]: list=range(627开发者_高级运维)

In [3]: list[::150]

Out[3]: [0, 150, 300, 450, 600]

the above code is right,but if i use the bellow code,caution:the l means long type, the return result is not like above,what's the hell?

In [4]: list=[1323l,123123l,4444l,12312312l]

In [5]: list=[1323l,123123l,4444l,12312312l]

In [6]: list[::2]

Out[6]: [1323L, 4444L]

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The step denotes the multiples of indices that are included in the slice, not of the actual values contained in the array. In your second example:

list[0] = 1323L
list[1] = 123123L
list[2] = 4444L
list[3] = 12312312L

Since you're using the default argument for the start of the slice, it will start at the first element (list[0]), and it will get every 2nd element after that, so it will also get list[2]. It does not look at what those elements are, only at their indices.