What does this line of code mean, from
[sock] = netutil.bind_sockets(None, 'localhost', family=socket.AF_INET)
I understand these assignments:
list[index] = val,
list[index1:index2] = list2, but I’ve never seen that from Tornado.
The function returns an element inside a container, and the author wants
sock bound to the element, not to the container.
Here is a more simple example of that syntax:
>>> def foo(): ... return ['potato'] ... >>> [p] = foo() >>> p 'potato'