[Twisted-Python] multiple arguments to a callback

Andrew Bennetts andrew-twisted at puzzling.org
Fri Feb 11 23:08:35 EST 2005

On Fri, Feb 11, 2005 at 04:36:41PM -0800, snacktime wrote:
> Can you do something like this, assuming that _cbnext returns
> one,two,three,four,five ?
> d = req.dbpool.runInteraction(self.transaction._cbmakeDetailRec)
> d.addCallbacks(self._cbnext,log.err)
>   def _cbnext(self,one,two,three,four,five):

The result of the callback is always passed as a single value, so you'd need
to do:

    def _cbnext(self, result):
        one, two, three, four, five = result

There's a short-cut for this, though: use Python's tuple-unpacking:

    def _cbnext(self, (one, two, three, four, five)):


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