$ sudo pip install pyroute2 $ cat example.py from pyroute2 import IPRoute with IPRoute() as ipr: print([x.get_attr('IFLA_IFNAME') for x in ipr.get_links()]) $ python example.py ['lo', 'p6p1', 'wlan0', 'virbr0', 'virbr0-nic']
In the runtime pyroute2 socket objects behave as normal sockets. One can use them in the poll/select, one can call recv() and sendmsg():
from pyroute2 import IPRoute # create RTNL socket ipr = IPRoute() # subscribe to broadcast messages ipr.bind() # wait for data (do not parse it) data = ipr.recv(65535) # parse received data messages = ipr.marshal.parse(data) # shortcut: recv() + parse() # # (under the hood is much more, but for # simplicity it's enough to say so) # messages = ipr.get()
But pyroute2 objects have a lot of methods, written to handle specific tasks:
from pyroute2 import IPRoute # RTNL interface with IPRoute() as ipr: # get devices list ipr.get_links() # get addresses ipr.get_addr()
Do not forget to release resources and close sockets. Also keep in mind, that the real fd will be closed only when the Python GC will collect closed objects.
The public API is exported by pyroute2/__init__.py.
It is done so to provide a stable API that will not be affected by changes in the package layout. There may be significant layout changes between versions, but if a symbol is re-exported via pyroute2/__init__.py, it will be available with the same import signature.
All other objects are also available for import, but they may change signatures in the next versions.
# Import a pyroute2 class directly. In the next versions # the import signature can be changed, e.g., NetNS from # pyroute2.netns.nslink it can be moved somewhere else. # from pyroute2.netns.nslink import NetNS ns = NetNS('test') # Import the same class from root module. This signature # will stay the same, any layout change is reflected in # the root module. # from pyroute2 import NetNS ns = NetNS('test')
The eventlet environment conflicts in some way with socket objects, and pyroute2 provides some workaround for that:
# import symbols # import eventlet from pyroute2 import NetNS from pyroute2.config.eventlet import eventlet_config # setup the environment eventlet.monkey_patch() eventlet_config() # run the code ns = NetNS('nsname') ns.get_routes() ...
This may help, but not always. In general, the pyroute2 library is not eventlet-friendly.