'Pretty-print important results.'

def pprint(self):

    print('Beta:', self.beta)
    print('Beta    Std    Error:', self.sd_beta)
    print('Beta    Covariance:', self.cov_beta)
    if hasattr(self, 'info'):
        print('Residual    Variance:', self.res_var)
        print('Inverse    Condition    #:', self.inv_condnum)
        print('Reason(s)    for    Halting:')
        for r in self.stopreason:
            print(('        %s' % r))
