[Twisted-Python] Multiple callbacks

[Аркадий Левин]

Hi, you need add "grid" to lambda arguments,

f = lambda _, grip=grip:self.gotDataBin(_, grid)

On Wed, Jan 25, 2012 at 6:04 PM, Tech Aficionado1743
<techaficionado1743 at gmail.com> wrote:
> Hello, can anyone help ?
> i can't understand why, in the piece of code below (S1),
> the parameter (grid) passed to the callback is the same,
> while i have 2 grid, 2 deferred and 2 lambda.
> The source S2 is working (2 different grid), but inelegant...
>
> Thank you.
>
>
> #----------- S1 ------------------------
>     def OnSubscribe(self):
>         for pool, grid in self.grids.items():
>             print 'grid = ',grid
>             d = self.frame.dbpoolMiddle.runQuery(allSelect.stmts['Set0'],
> (pool, self.frame.ctxName))
>             print 'deferred = ', d
>             f = lambda _:self.gotDataBin(_, grid)
>             print 'lambda =', f
>             d.addCallback(f)
>
>     def gotDataBin(self, result, grid):
>         print 'callback = ', grid
>         grid.ReplaceRowsFromSQL(result)
>
> #----------- Output S1 ----------------
>
> grid =  <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at
> 0x2d61b48> >
> deferred =  <Deferred at 0x2e6bd28>
> lambda = <function <lambda> at 0x02DCDCF0>
>
> grid =  <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid *' at
> 0x2d5e788> >
> deferred =  <Deferred at 0x2e6bdc8>
> lambda = <function <lambda> at 0x02DCDCB0>
>
> callback =  <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid
> *' at 0x2d5e788> > # expected to get 1st grid here: 0x2d61b48, not two times
> 2nd grid
> callback =  <cfm.wx.CfmGrid.CfmGrid; proxy of <Swig Object of type 'wxGrid
> *' at 0x2d5e788> >
>
> #----------- S2 ------------------------
>     def OnSubscribe(self):
>         for pool, grid in self.grids.items():
>             d = self.frame.dbpoolMiddle.runQuery(allSelect.stmts['Set0'],
> (pool, self.frame.ctxName))
>
>             def toto(grid):
>                 d.addCallback(lambda _:self.gotDataBin(_, grid))
>
>             toto(grid)
>
>     def gotDataBin(self, result, grid):
>         print 'callback = ', grid
>         grid.ReplaceRowsFromSQL(result)
>
>
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