title: Python Reorganize dataframe
body: <p>I have this following dataframe that I want to transform to reorganize data:</p>
  <pre><code>DateTime_Equip1_TEMP  Equip1_TEMP  DateTime_Equip2_TEMP Equip2_TEMP
  01/01/2022 15:00        37         01/01/2022 15:05      34.5
  01/01/2022 15:05        36         01/01/2022 15:10      34.5
  01/01/2022 15:10        37         01/01/2022 15:15      34.5
  </code></pre>
  <p>My goal is to transform my dataframe like this:</p>
  <pre><code>DateTime          Equip   TEMP
  01/01/2022 15:00  Equip1  37
  01/01/2022 15:05  Equip1  36
  01/01/2022 15:10  Equip1  37
  01/01/2022 15:05  Equip2  34.5
  01/01/2022 15:10  Equip2  34.5
  01/01/2022 15:15  Equip2  34.5
  </code></pre>
  <p>The parameter DateTime can be different in a same row and I can have until 48 equip.</p>
  <p>I found this post (<a href="https://stackoverflow.com/questions/30784567/python-pandas-transform-dataframe">Python Pandas, transform dataframe</a>) and try to use melt() function  but it was not really succesfull.. I don't if there is a simple way to do that or not. Thanks for your help. Regards</p>