lebebfkadal

def leb(num_points,x):

    data = get_x_i(num_points-1)
    N=num_points-1
    lg=0.0
    lagrange_basis = numpy.ones(N + 1,dtype=float)
    for i in xrange(N + 1):
         for j in xrange(N + 1):
            if i != j:
                print lagrange_basis

                lagrange_basis[i] *= (x - data[j]) / (data[i] - data[j])

    for i in xrange(N+1):
        lg+=numpy.abs(lagrange_basis[i])



    return lg