title: Plot datetime.time in seaborn
body: <p>Hi I am having trouble plotting a datetime with seaborn. I am trying to plot a categorical data with x as datatype <code>datetime.time</code> but I get these error:</p>
  
  <pre><code>float() argument must be a string or a number, not 'datetime.time'
  </code></pre>
  
  <p>This is my df:</p>
  
  <pre><code>       toronto_time             description
  0      00:00:50                   STATS
  1      00:01:55                   STATS
  2      00:02:18                   ONLINE
  3      00:05:24                   STATS
  4      00:05:34                   STATS
  5      00:06:33                   OFFLINE
  </code></pre>
  
  <p>This is my code:</p>
  
  <pre><code>import matplotlib.pyplot as plt
  import seaborn as sns
  
  plt.style.use('seaborn-colorblind')
  
  plt.figure(figsize=(8,6))
  sns.swarmplot('toronto_time', 'description', data=df);
  plt.show()
  </code></pre>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>dtype of 'toronto_time' is an object. When I used pd.to_datetime it converts to datetime however it adds a date.</p>