import colour

illuminant = colour.ILLUMINANTS['cie_2_1931']['D65']
RGB = [[1.0, 0.0, 0.0],
       [0.0, 1.0, 0.0],
       [0.0, 0.0, 1.0],
       [1.0, 1.0, 0.0]]

XYZ = colour.sRGB_to_XYZ(RGB)
Luv = colour.XYZ_to_Luv(XYZ, illuminant)
print(Luv)

[[  53.23288179  175.05983019   37.76179061]
 [  87.73703347  -83.0685535   107.41996534]
 [  32.30258667   -9.3957447  -130.35155921]
 [  97.13824698    7.71536065  106.8097148 ]]