Carsten Wartmann wrote:
>  Thomas Heller schrieb:
> > Carsten Wartmann wrote:
> >> Hello,
> >>
> >> after yours help on this list I got my application working, in fact it
> >> is working like a charm.
> >>
> >> However, as I looked today on my "code" I noticed that I convert the
> >> ctypes structures (given back from a dll function) into python data with
> >> a simple for...in...: construct.
> >>
> >> I guess there must be a better way?
> >>
> >> I am converting this:
> >>
> >> SPINKIT_HANDLE = c_void_p
> >> class SPINKIT_DATA(Structure):
> >>     _fields_ = [("Device", SPINKIT_HANDLE),
> >>                 ("Spins", c_int * 6),
> >>                 ("Buttons", BOOL * 7)]
> >> SPINKIT_DATA_SIZE = sizeof(SPINKIT_DATA)
> >>
> >> into this:
> >>
> >> class SpinkitPyData:
> >>     def __init__(self):
> >>         self.Handle = -1
> >>         self.Spins = [0,0,0,0,0,0]
> >>         self.Buttons = [False,False,False,False,False,False,False]
> >
> > Sorry, but I'm not sure what you're asking.
>  
>  Hrm, that happens when you write in a hurry...
>  
>  The funtion I am using is returning SPINKIT_DATA(Structure): and I find 
>  that this is not easy to use in python and so I "convert" it into 
>  SpinkitPyData and return() this to have easier acces to the results.
>  
>  def SpinKitReadNonBlocking(self,data):
>          "Read Immediate"
>          datac=SPINKIT_DATA()
>          if windll.spinkit.SpinKitReadImmediate(self.Handle,pointer(datac)):
>              data.Device=self.Handle
>              i=0
>              for spin in datac.Spins:
>                  data.Spins[i]=spin
>                  i=i+1
>              i=0
>              for button in datac.Buttons:
>                  data.Buttons[i]=button
>                  i=i+1
>              return(True)
>          else:
>              return(False)
>  
>  
>  What I am asking is, if there is a more elegant way to convert the 
>  SPINKIT_DATA(Structure) into something more pythonesque like my 
>  SpinkitPyData which I think is a nice representation and easy to access 
>  inside python.
>  
>  Hope this makes it more clear?
Yes it does.

The SPINKIT_DATA instance should behave the same way as the SpinKitPyData instance that you 
create,
if you abstract from some details.  Can't you use it directly?  And, imo, a more pythonic wa
y to
write your SpinKitReadNonBlocking method would be this (it returns the SPINKIT_DATA instance
 or None):

def SpinkKitReadNonBlocking(self):
    data = SPINKIT_DATA()
    if windll.spinkit.SpinKitReadImmediate(self.Handle, byref(data)):
        return data
    return None


Thomas



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