Discussion on: A Pythonic Guide to SOLID Design Principles

[Victor]

In the generateReport function signature you either have to specify the concrete FTPClient class as the parameter type

void generateReport<TTransferClient>(TTransferClient client)
  where TTransferClient: ICanUpload, ICanDownload
{
  ...
}

Also, I think IFTPClient is a violation of SRP in this case. You should simply take in both separately (ICanUpload uploader, ICanDownload downloader).