title: How to combine multiple tweets of one year in one cell?
body: <p>Say I have this dataframe</p>
  <pre><code>| DateTime                     | Text                |
  | --------                     | --------------      |
  | 2021-12-21 15:06:18+00:00    | Tweettext1          |
  | 2021-12-21 14:05:32+00:00    | Tweettext2          |
  | 2020-12-21 15:06:18+00:00    | Tweettext3          |
  | 2020-12-21 14:05:32+00:00    | Tweettext4          |
  </code></pre>
  <p>And I want to get this</p>
  <pre><code>| DateTime | Text                  |
  | -------- | ---------             |
  | 2021     | Tweettext1, Tweettext2|
  | 2020     | Tweettext3, Tweettext4|
  
  </code></pre>
  <p>As I have dataframe of tweets each tweet in one row and I want to combine all the tweets of each year in only one cell. Is this possible in R or python? Thank you in advance</p>