def repartuni(x,a,b):
    #fonction de répartition sur [a,b]
    if x<a:
        return(0)
    elif (a<=x and x<=b):
        return((x-a)/(b-a))
    else:
        return(1)
def graph_repartuniforme(a,b):
    abs=np.linspace(a-(b-a),b+(b-a),200)
    y=[repartuni(x,a,b) for x in abs]
    plt.grid()
    plt.plot(abs,y)
    plt.show()