title: How to select distinct rows from groupby object in Pandas
body: <p>I'm trying to drop rows from a groupby object based on a condition:</p>
  
  <pre><code>Group    value
    A        0
    A       20
    A       25
    B        5
    C        6
    C       17
  </code></pre>
  
  <p>With a dataframe, if I wanted to drop anything with a value less than 10, I could just call <code>df[df['value']&gt;=10]</code>. I can't seem to find a way to do something similar with a groupby object to get.</p>
  
  <pre><code> Group    value
    A       20
    A       25
    C       17
  </code></pre>