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t.p.c._Defer(Deferred, NotKnown) : class documentation
Part of twisted.persisted.crefutil
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API Documentation for Twisted, generated by pydoctor at 2011-10-27 16:17:34.
a callable used to stop the pending operation scheduled by this
is invoked. The canceller will be passed the deferred whose cancelation is
requested (i.e., self).
If a canceller is not given, or does not invoke its argument's
Note that if a canceller is not given,
errback may still be invoked exactly once, even though
defer.py will have already invoked
errback, as described
above. This allows clients of code which returns a
cancel it without requiring the
instantiator to provide any specific implementation support for
cancellation. New in 10.0.
(type: a 1-argument callable which takes a
return result is ignored.