def test_evalf(): i = intervalles.conversion_chaine_ensemble(']-oo;-2]U[1/4;1/2[') assert (str(i.evalf()) == ']-oo;-2.0]U[0.25;0.5[') i = Intervalle(-sqrt(2), pi) assert (str(i.evalf()) == '[-1.41421356237310;3.14159265358979]') assert (str(i.evalf(n=3)) == '[-1.41;3.14]')