code: def _partial_corr(self, x=None, y=None, covar=None, x_covar=None, y_covar=None,
                    tail='two-sided', method='pearson'):
      
      stats = partial_corr(data=self, x=x, y=y, covar=covar, x_covar=x_covar,
                           y_covar=y_covar, tail=tail, method=method)
      return stats
docs: Partial and semi-partial correlation.