Python Module version + non-blocking?

Could this eventually be a python module, rather than being geared more towards a command line tool? Specific features that would be really useful would be non-blocking behaviors (such as an upload/download manager that could be monitored by other code). Imagine this being part of a python GUI with a progress-bar or similar. What about progress based on bytes uploaded/downloaded versus file count. Finally, what about a continuous scan of an upload path where files are being progressively added, and then uploaded by the manager? Nice job on the code!

Start by reading the existing command-line interface and the upload/download behavior in the repository. The issue does not name files or tests; completion would require an agreed module API covering non-blocking transfers, byte-based progress, and continuous scanning.

Written by the indexing model from the issue text.