title: How to extract intercept parameter from python pygam.LinearGAM
body: <p>I am looking to extract the fitted parameter from a model fit with pygam.  Here is a reproducible example.</p>
  
  <pre><code>from pygam import LinearGAM, s, f
  from pygam.datasets import wage
  X, y = wage()
  gam = LinearGAM(s(0) + s(1) + f(2)).fit(X, y)
  </code></pre>
  
  <p>Here are few things I have tried.</p>
  
  <pre><code>#gam.summary() ## This does not show it.
  #gam.intercept_ ## This does not exit.
  #gam.terms.info ## This does not contain it.
  #gam.partial_dependence(-1) ## This raises an error.
  </code></pre>
  
  <p>Here is a relevant GitHub issue that does not appear top have been implemented: <a href="https://github.com/dswah/pyGAM/issues/85" rel="nofollow noreferrer">https://github.com/dswah/pyGAM/issues/85</a></p>