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pythoncallbacktwisteddeferred

Twisted - pass result to mutiple callbacks

I have two callback functions B, C and I would like them process the result of function A returning Deferred (A->B->C). Normally, I would join them into one but for a reason, I can't do that.

From what I know, twisted callback pipeline processes return of previous callback. Solution is obviously add B, C as callbacks to A, and pass original return of A to B and through return to C. Is there a better way to do it, something like reverse DeferredList?

Solution

  • Or maybe you could use inlineCallbacks

    `
from twisted.internet.defer import inlineCallbacks

@inlineCallbacks
def doThing():
     result = yield A()
     B(result)
     C(result)

     # or if it is a function returning a deferred
     yield B(result)
     yield C(result)
`