距离内的所有点

Question

I´m really desperate. What I wanna do ist: I have a list of 2d points

    L=[(22.37, 29.48), (20.50, 30.28), (20.50, 30.28), (20.77, 30.01), (20.77, 30.01), (21.04, 29.74), (21.04, 29.74), (22.58, 29.44), (22.78, 29.19), (23.11, 28.87)]

(my list has 30000 tuples (xn,yn)). Now I want all points within distance dmax (from every point). Therefor I used scipy.spatial.KDTree() and query_ball_point.

    import scipy.spatial
    tree = scipy.spatial.KDTree(XY)
    k=np.array(tree.query_ball_tree(tree, dmax))   

For my first point I get

    array([ [ 12475L, 12476L, 15081L, 15082L, 15083L, 22380L, 22381L, 22562L, 22379L, 12469L, 12470L, 13469L, 13470L, 13471L, 13472L, 15084L, 15085L, 15086L, 15087L, 14L, 15L, 16L, 13468L, 22374L, 22375L, 22376L, 22377L, 22378L, 22557L, 22558L, 22559L, 22560L, 22561L, 23091L, 22503L, 22504L, 22505L, 1L, 2L, 3L, 4L, 5L, 6L,...]])

Why there are these 'L's?? How can I remove these?

Thanks for help!

Answer 1

They're long integers. It's not hard to find stuff like this yourself, try googling for 'python numbers with L' and you would find similar questions like Why do integers in database row tuple have an 'L' suffix? :)

Answer 2

不需要做任何事情，它们是长整数，您可以通过使用它们来进行计算。

Answer 3

The L won't have any effect as others have pointed out, you will still be able to use those numbers to access an array by index - why don't you just try it?. For more information you should read about Integers in computer science .