I couldn't come up with a cooler name, so I'm sticking to "torrent" for now. Torrent is a pure-Python BitTorrent client written on top of Tornado, an asynchronous networking library.

• Pure-Python. No libtorrent!
• HTTP and UDP tracker support
• Downloads files (works best for smaller ones)
• Supports Python 2 (and Python 3 every few commits)

Run the CLI frontend and watch the hacker text fly:

user@hostname:~$ python -m bittorrent.client.cli --torrent=filename.torrent --path=/tmp/downloads

• Little to no optimizations when writing pieces to disk
• Tons of disk I/O
• Eats up CPU while hashing
• No optimistic unchoking
• No support for multiple torrents
• No µTP
• No PEX
• No DHT
• No magnet links
• bittorrent.bencode is incredibly slow
• No cool UI

• Sometimes all of the socket connections die with ECONNREFUSED
• Sometimes we start aggressively scraping trackers over and over.