Using CLI

; Make .torrent out of `video.mkv`
$ torrentool torrent create /home/my/files_here/video.mkv

; Make .torrent out of entire `/home/my/files_here` dir,
; and put some open trackers announce URLs into it,
; and publish file on torrent caching service, so it is ready to share.
$ torrentool torrent create /home/my/files_here --open_trackers --cache

; Print out existing file info.
$ torrentool torrent info /home/my/some.torrent

Use command line --help switch to know more.

From your Python code

from torrentool.api import Torrent

# Reading and modifying an existing file.
my_torrent = Torrent.from_file('/home/idle/some.torrent')
my_torrent.total_size  # Total files size in bytes.
my_torrent.magnet_link  # Magnet link for you.
my_torrent.comment = 'Your torrents are mine.'  # Set a comment.
my_torrent.to_file()  # Save changes.

# Or we can create a new torrent from a directory.
new_torrent = Torrent.create_from('/home/idle/my_stuff/')  # or it could have been a single file
new_torrent.announce_urls = 'udp://tracker.openbittorrent.com:80'
new_torrent.to_file('/home/idle/another.torrent')