from numpy.lib.scimath import sqrt

class V2D:
    pass

if __name__=='__main__':

    k=V2D(20,30)
    v=V2D(2,3)
    print('{0} + {1} = {2}'.format(k,v,k+v))
    print('{0} - {1} = {2}'.format(k,v,k-v))
    print('{0} * {1} = {2}'.format(k,v,k*v))
    print('abs(v)  ',abs(v))
    print('v==k  ',v==k)
    print('v==v  ',v==v)

    print('-'*40)
    v2=V2D(2.0001,3.0001)
    v3=V2D(2.00000001,3.00000001)
    print('v = ',v)
    print('v2 = ',v2)
    print('v3 = ',v3)

    print('-'*20)
    V2D.set_tol(1e-2)
    print('tolleranza = {0}'.format(V2D.get_tol()))
    print('v==v2  ',v==v2)
    print('v==v3  ',v==v3)

    print('-'*20)
    V2D.set_tol(1e-5)
    print('tolleranza = {0}'.format(V2D.get_tol()))
    print('v==v2  ',v==v2)
    print('v==v3  ',v==v3)

    print('-'*20)
    V2D.set_tol(1e-10)
    print('tolleranza = {0}'.format(V2D.get_tol()))
    print('v==v2  ',v==v2)
    print('v==v3  ',v==v3)

    print('-'*40)
    #OK funziona ma formalmente non e' il massimo perche'
    print('set_tol in dir(v)','set_tol' in dir(v))
    try:
        v.set_tol(1e-3)
    except Exception as err:
        print(err)