title: How to run a GLM gamma regression in Python with R like formulas
body: <p>I am running a GLM regression in Python using statsmodels using the following code. I specifically want to implement a log link function. I am able to write R like formulas using Statsmodels.</p>
  
  <p>The following code successfully runs but throws up a Deprecation Warning. Can anyone suggest how to get rid of this warning. Thanks for the help.</p>
  
  <p>Code:</p>
  
  <pre><code>mod = smf.glm(formula='y ~  C(x1) + C(x2) + C(x3) + x4 + x5', data=data,family=sm.families.Gamma(link=sm.families.links.log))
  reg = mod.fit()
  print(reg.summary())
  </code></pre>
  
  <p><strong>Warning:
  DeprecationWarning: Calling Family(..) with a link class as argument is deprecated.
  Use an instance of a link class instead.</strong></p>