Hi @vstadmin that’s correct, those limitations are specific to host DFU, which uses the Notecard to store a binary before delivering it to the host. And while it is possible in theory to use the DFU mechanism to obtain Python files, as discussed in this thread it’s not something that we have tested, so I cannot guarantee it will work.
If you’re looking to pull down .py files from a remote source to get into the filesystem of your device, the web.get approach is your best bet.