def distance_regions(r1, r2, fn=min, start=1e9):
"""Operate on pairwise distances between two regions
if fn is =min=, smallest distance is returned,
if fn is =max=, largest distance is returned
"""
dists = [lib.eu_dist(*pair) for pair in
itt.product(r1.borders(), r2.borders())]
return reduce(fn, dists, start)
def linsize(self,):
dists = [lib.eu_dist(*pair) for pair in lib.allpairs(self.borders())]
return reduce(max, dists, 0)
pass
def distance_regions_centra(r1,r2):
"""Return distance between centroids of the two regions"""
return lib.eu_dist(r1.center(), r2.center())
