python - Reordering numpy array -

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i have following numpy array:

arr = np.array([0.3, 3.5, 12.0, 2.9, 11.0, 23.0])

i want reorder array starts @ 4th position, followed items after start position in order, followed items before start position. i.e.

[2.9, 11.0, 23.0, 0.3, 3.5, 12.0]

how can without loop?

try

np.roll(arr, -3)

negative since want "move" elements left


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