def check_X_y ( X , y ) : if len ( X ) != len ( y ) : raise ValueError ( 'Inconsistent input and output data shapes. ' 'found X: {} and y: {}' . format ( X . shape , y . shape ) )
python validate two dataset
tool to ensure input and output data have the same number of samples
def check_X_y(X, y):
    """
    tool to ensure input and output data have the same number of samples

    Parameters
    ----------
    X : array-like
    y : array-like

    Returns
    -------
    None
    """
    if len(X) != len(y):
        raise ValueError('Inconsistent input and output data shapes. '\
                         'found X: {} and y: {}'.format(X.shape, y.shape))