title: Name each label in the plot. Matplotlib
body: <p>My data contains location points of the user. I need to plot 5 users location point.</p>
  
  <pre><code>df.set_index('tslot').groupby('user')['Location'].plot()
  </code></pre>
  
  <p>Which givesthe below figure as output.
  <a href="https://i.stack.imgur.com/CzKZY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CzKZY.png" alt=""></a></p>
  
  <p>How to find the color indicates specific user-id in the above figure.</p>
  
  <pre><code>For example:
  Blue is User 1
  Green is user 300
  Red is user 48
  </code></pre>