title: I have a data frame with one column and I'd like to split it into two columns
body: <p>I have a data frame with one column and I'd like to split it into two columns and</p>
  <p>for example</p>
  <pre><code>   colonne 1
  10/10/2020 00:03:00
  10/10/2020 00:07:00 ....
  </code></pre>
  <p>and i want it to be like that :</p>
  <pre><code>date          hour 
  10/10/2020    00:03:00 ....
  </code></pre>