title: How to extract the regression coefficient from statsmodels.api?
body: <pre><code> result = sm.OLS(gold_lookback, silver_lookback ).fit()
  </code></pre>
  
  <p>After I get the result, how can I get the coefficient and the constant?</p>
  
  <p>In other words, if
  <code>y = ax + c</code>
  how to get the values <code>a</code> and <code>c</code>?</p>