For files within a managed folders, the API provides few interactions. You can use the get_download_stream() method.
For easier usage, you should consider have datasets that have more methods available.
WIth the get_download_stream, i couldnt read excel. is there any different way to do that?
with handle1.get_download_stream('Sites.xlsx') as f:
It reads as xml content.
To add more details: