Storing uploads momentarily

Found a solution to this

from io import BytesIO

tempfile = TempFile.objects.filter(userid=self.request.user.id)
if tempfile.exists():
    fileobject = BytesIO(tempfile.first().file.tobytes())
    parse.document(fileobject)

BytesIO reads the byte file that came from the database and returns a file-like object (which is perfect for the situation). I am curious. Where does the Django documentation cover stuff like this? I got hints from here and here.