def build_distance_matrix(self):
if len(self.coordinates) == 0:
return None
coord_len = len(self.coordinates)
# Zero matrix.
self.matrix = [[0 for i in range(coord_len)] for j in range(coord_len)]
for ii in range(coord_len):
for jj in range(coord_len):
self.matrix[ii][jj] = Helper.get_distance(
self.coordinates[ii], self.coordinates[jj])
return self.matrix
def test_distance(self):
point_1 = (4, 3)
point_2 = (9, 4.5)
distance = Helper.get_distance(point_1, point_2)
self.assertAlmostEqual(distance, 5.2201532544)
