Appdirs user_download_dir
Following up !218 (merged), appdirs will actually soon provide a user_download_dir function to determine the downloads directory, which will more correctly report the download directory on Windows.
As this hasn't been merged upstream yet, it obviously can't be implemented yet either.
https://github.com/ActiveState/appdirs/pull/147/files
Also note that the appdirs version requirement will need to be updated to whatever release includes this feature.