title: Filter a column by multiple values
body: <p>I'm new at Python and I want to filter rows by multiple column values.
  The name of my dataframe is <code>df</code>, the column name is <code>values</code> and I want to filter this column by the following values:</p>
  <pre><code>2, 4, 5, 9
  </code></pre>
  <p>My dataframe is like this:</p>
  <pre><code>name value
  Jon    4
  Ron    5
  Paul   10
  Max    3 
  </code></pre>
  <p>So grateful,
  Henrique.</p>