title: sort_values() method in pandas
body: <p>I have the following subset of data and I need to sort the <code>Education</code> column in ascending order; from <code>0 to 17</code>.</p>
  
  <p><a href="https://i.stack.imgur.com/wwxNW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/wwxNW.png" alt="enter image description here"></a></p>
  
  <p>I tried the following code without success.</p>
  
  <pre><code>suicide_data.sort_index(axis=0, kind='mergesort')
  </code></pre>
  
  <p>also...</p>
  
  <pre><code>suicide_data.Education.sort_values()
  </code></pre>
  
  <p>and...</p>
  
  <pre><code>suicide_data.sort_values('Education')
  </code></pre>
  
  <p>Here is the error I'm getting...</p>
  
  <pre><code>TypeError: '&gt;' not supported between instances of 'float' and 'str'
  </code></pre>
  
  <p>The documentation says that <code>str</code> can be sort with the <code>sort_values()</code> method. Does anyone know how to sort the <code>Education</code> column in ascending order?</p>