Why can't I add a list to an array?

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Nikolai Sidorenko2015-01-02 22:02:21

Python

Nikolai Sidorenko, 2015-01-02 22:02:21

Happy New Year!
I find the angle between vectors clockwise.
coords =
a = coords[1::1].append(coords[0])
Why doesn't a output anything?

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1 answer(s)

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GavriKos, 2015-01-02
@NSidorov

In variable a you put what append returns. And he returns, according to the manual - nothing. Here in a there is nothing.