[Python] Combine 2 numpy 1d arrays taking elements from each consecutively

I have 2 arrays

xs1 = [ x0, x1, x2, x3, x4, x5, x6, x7, x8]
xs2 = [x00, x01, x02, x03, x04, x05, x06, x07, x08]


I want to combine them taking an element from each at a time.

xs = [x0, x00, x1, x01, x2, x02, x3, x03, x4, x04, x5, x05, x6, x06, x7, x07, x8, x08]


How can i achieve this with numpy without a for loop?

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