...whether any combination of 3 numbers sum to 0.

You are allowed to use a number more than once, as long as you use only 3 numbers total (e.g. 0+0+1 ).

0 + 0 + 1 is 1, not 0.

Can someone approve this Python translation?

The author has been MIA.

You are allowed to use a number more than once, as long as you use only 3 numbers total (e.g. 0+0+1 ).

There are no solid checks on this requirement; the only case that kinda tests for it [0], which is trivial and really can't catch it.

Please add test cases like [1,3,6,10,15,-12].