如何在python中忽略numpy ndarray的所有最后一个元素？

Question

So I can slice a numpy array quite simply as:

a = np.arange(10)
a[:-3]
array([0, 1, 2, 3, 4, 5, 6])

but now say I do:

a = np.vstack((a, a))
a
array([[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
       [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]])

Is there a nice pythonic way (without looping) to get:

array([[0, 1, 2, 3, 4, 5, 6],
       [0, 1, 2, 3, 4, 5, 6]])

Thanks.

Answer 1

感谢Divakar的评论。

a[:,:-3]