def get_nearest_node_by_lat_long(self, lat, long):
nodes = self.distance_service.get_all_nodes()
nodes_distances = [
{
"node": node,
"distance": l2distance([lat, long], [float(node.latitude), float(node.longitude)])
} for node in nodes
]
return reduce(self._min, nodes_distances)["node"]
def test_triangle_inequality(x, y, z):
return l2distance(x, z) <= l2distance(x, y) + l2distance(y, z) or math.isclose(
l2distance(x, z), l2distance(x, y) + l2distance(y, z)
)
def test_l2distance_non_degenerate(x):
return l2distance(x, x) == 0
def test_l2distance_symmetric(x, y):
return l2distance(x, y) == l2distance(y, x)
def test_l2distance_non_negative(x, y):
return l2distance(x, y) >= 0