title: Parse column as time in pandas
body: <p>I have a time column in mixed format, e.g. 19:30 and 8:00 pm. How do I 
  assign it as a uniform time format, i.e. %H:%m or %H:%m %p?</p>
  
  <pre><code>df["Timestamp"].head(10)
  
  
  0       10:00
  1    10:30 AM
  2       11:00
  3    11:30 AM
  4       12:00
  5    12:30 PM
  6       13:00
  7     1:30 PM
  8       14:00
  9       14:30
  Name: Timestamp, dtype: object
  </code></pre>