def spatial_hash(coordinates):
import scipy, scipy.spatial
try:
from scipy.spatial import cKDTree as shash
except:
from scipy.spatial import KDTree as shash
return shash(coordinates)
def spatial_hashes(coordinates, sigma_bins):
import scipy, scipy.spatial
try:
from scipy.spatial import cKDTree as shash
except:
from scipy.spatial import KDTree as shash
return tuple([shash(coordinates[ii]) for ii in sigma_bins])