title: Trying to convert object to DateTime, getting TypeError
body: <p>I have two dataframes (see <a href="https://imgur.com/a/2Jh9IG2" rel="nofollow noreferrer">here</a>), which contain dates and times.
  The details for the first data frame are:</p>
  
  <pre><code>Date         object
  Time         object
  Channel1    float64
  Channel2    float64
  Channel3    float64
  Channel4    float64
  Channel5    float64
  dtype: object
  </code></pre>
  
  <p>The details for the second data frame are:</p>
  
  <pre><code>Date     object
  Time     object
  Mean    float64
  STD     float64
  Min     float64
  Max     float64
  dtype: object
  </code></pre>
  
  <p>I am trying to convert the times to a DateTime object so that I can then do a calculation to make the time relative to the first time instance (i.e. the earliest time would become 0, and then all others would be seconds after the start).</p>
  
  <p>When I try (from <a href="https://stackoverflow.com/questions/38333954/converting-object-to-datetime-format-in-python">here</a>):</p>
  
  <pre><code>df['Time'] = df['Time'].apply(pd.Timestamp)
  </code></pre>
  
  <p>I get this error: </p>
  
  <pre><code>TypeError: Cannot convert input [15:35:45] of type &lt;class 'datetime.time'&gt; to Timestamp
  </code></pre>
  
  <p>When I try (from <a href="https://stackoverflow.com/questions/49389358/typeerror-class-datetime-time-is-not-convertible-to-datetime">here</a>):</p>
  
  <pre><code>df['Time'] = pd.to_datetime(df['Time'])
  </code></pre>
  
  <p>but it gives me this error:</p>
  
  <pre><code>TypeError: &lt;class 'datetime.time'&gt; is not convertible to datetime
  </code></pre>
  
  <p>Any suggestions would be appreciated.</p>