title: how to read an excel file opened with pandas
body: <p>I have to read some sheets in excel files that can be opened during the execution of the program. Furthermore I must have the possibility to modify them even if they are opened by python. I noticed that the command is not enough:</p>
  
  <pre><code>import pandas as pd
  data = pd.read_excel(r"filename")
  </code></pre>
  
  <p>Should I use other packages?</p>