title: Can datetime parse this format of time string?
body: <p>My original time string is in this format:</p>
  <pre><code>2017-01-22 13:54:55
  </code></pre>
  <p>But in excel after opening the file, the date format becomes:</p>
  <pre><code>01/22/17 13:54:55
  </code></pre>
  <p>I tried to parse it in this way:</p>
  <pre><code> try:
                  return dt.strptime('01/22/17 13:54:55', '%Y-%m-%d %H:%M:%S')
              except Exception as e:
                  try:
                      return dt.strptime('01/22/17 13:54:55', '%-m/%-d/%y %H:%M:%S')
                  except Exception as e:
                      raise ValueError('Reference time must be the format of: %Y-%m-%d %H:%M:%S, or a datetime object')
  </code></pre>
  <p>Is there a way to parse &quot;01/22/17 13:54:55&quot; by the strptime function?</p>