SciPy

scipy.spatial.cKDTree.query_pairs

cKDTree.query_pairs(self, r, p, eps)

Find all pairs of points whose distance is at most r.

Parameters:

r : positive float

The maximum distance.

p : float, optional

Which Minkowski norm to use. p has to meet the condition 1 <= p <= infinity.

eps : float, optional

Approximate search. Branches of the tree are not explored if their nearest points are further than r/(1+eps), and branches are added in bulk if their furthest points are nearer than r * (1+eps). eps has to be non-negative.

Returns:

results : set

Set of pairs (i,j), with i < j, for which the corresponding positions are close.