title: Pandas convert Column to time
body: <h1>Here is my DF</h1>
  <pre><code>             Start-Time Running-Time Speed-Avg HR-Avg
  0    2016-12-18 10:8:14       0:24:2        20    138
  1    2016-12-18 10:8:14       0:24:2        20    138
  2    2016-12-23 8:52:36      0:31:19        16    134
  3    2016-12-23 8:52:36      0:31:19        16    134
  4     2016-12-25 8:0:51      0:30:10        50    135
  5     2016-12-25 8:0:51      0:30:10        50    135
  6    2016-12-26 8:41:26       0:10:1        27    116
  7    2016-12-26 8:41:26       0:10:1        27    116
  8      2017-1-7 11:16:9      0:26:15        22    124
  9      2017-1-7 11:16:9      0:26:15        22    124
  10    2017-1-10 19:2:54      0:53:51         5    142
  11    2017-1-10 19:2:54      0:53:51         5    142
  </code></pre>
  <p>and i have been trying to format this column in <strong>H:M:S</strong> format
  using</p>
  <pre><code>timeDF=(pd.to_datetime(cleanDF['Running-Time'],format='%H:%M:%S'))
  </code></pre>
  <p>but i have been getting  <code>ValueError: time data ' 0:24:2' does not match format '%M:%S' (match)</code> this <strong>error</strong></p>
  <p>Thank you in advance.</p>