libtorrent python binding
| Author: | Arvid Norberg, arvid@libtorrent.org |
|---|
Table of contents
building
Building the libtorrent python bindings will produce a shared library (DLL) which is a python module that can be imported in a python program.
building using setup.py
There is a setup.py shipped with libtorrent that can be used on windows. On windows the setup.py will invoke bjam and assume that you have boost sources at $BOOST_PATH. The resulting executable is self-contained, it does not depend any boost or libtorrent dlls.
On other systems, the setup.py is generated by running ./configure --enable-python-binding.
To build the Python bindings do:
Run:
python setup.py build
As root, run:
python setup.py install
building using boost build
To set up your build environment, you need to add some settings to your $BOOST_BUILD_PATH/user-config.jam.
Make sure your user config contains the following line:
using python : 2.3 ;
Set the version to the version of python you have installed or want to use. If you've installed python in a non-standard location, you have to add the prefix path used when you installed python as a second option. Like this:
using python : 2.6 : /usr/bin/python2.6 : /usr/include/python2.6 : /usr/lib/python2.6 ;
The bindings require at least python version 2.2.
For more information on how to install and set up boost-build, see the building libtorrent section.
Once you have boost-build set up, you cd to the bindings/python directory and invoke bjam with the apropriate settings. For the available build variants, see libtorrent build options.
For example:
$ bjam dht-support=on link=static
On Mac OS X, this will produce the following python module:
bin/darwin-4.0/release/dht-support-on/link-static/logging-none/threading-multi/libtorrent.so
using libtorrent in python
The python interface is nearly identical to the C++ interface. Please refer to the library reference. The main differences are:
- asio::tcp::endpoint
- The endpoint type is represented as a tuple of a string (as the address) and an int for the port number. E.g. ('127.0.0.1', 6881) represents the localhost port 6881.
- libtorrent::time_duration
- The time duration is represented as a number of seconds in a regular integer.
The following functions takes a reference to a container that is filled with entries by the function. The python equivalent of these functions instead returns a list of entries.
- torrent_handle::get_peer_info
- torrent_handle::file_progress
- torrent_handle::get_download_queue
- torrent_handle::piece_availability
create_torrent::add_node() takes two arguments, one string and one integer, instead of a pair. The string is the address and the integer is the port.
session::set_settings() not only accepts a session_settings object, but also a dictionary with keys matching the names of the members of the session_settings struct. When calling set_settings, the dictionary does not need to have every settings set, keys that are not present, are set to their default value.
For backwards compatibility, session::settings() still returns a session_settings struct. To get a python dictionary of the settings, call session::get_settings.
For an example python program, see client.py in the bindings/python directory.
A very simple example usage of the module would be something like this:
import libtorrent as lt
import time
ses = lt.session()
ses.listen_on(6881, 6891)
e = lt.bdecode(open("test.torrent", 'rb').read())
info = lt.torrent_info(e)
params = { 'save_path': '.', \
'storage_mode': lt.storage_mode_t.storage_mode_sparse, \
'ti': info }
h = ses.add_torrent(params)
s = h.status()
while (not s.is_seeding):
s = h.status()
state_str = ['queued', 'checking', 'downloading metadata', \
'downloading', 'finished', 'seeding', 'allocating']
print '%.2f%% complete (down: %.1f kb/s up: %.1f kB/s peers: %d) %s' % \
(s.progress * 100, s.download_rate / 1000, s.upload_rate / 1000, \
s.num_peers, state_str[s.state])
time.sleep(1)