[Pyrex] is this an "if" bug?

[Bryan Weingarten]

i don't understand why this doesn't work


cdef object callback

def play(self, callback=None):
    if not callback:
        self.callback = default_callback       
    else:
         self.callback = callback  


or this doesn't work

def play(self, callback=None):
    self.callback = callback or default_callback       
   

but this _does_ work:

def play(self, callback=None):
    if not callback:
        callback = default_callback       
   
    self.callback = callback   


on the fail cases i get this error:
TypeError: 'NoneType' object is not callable



bryan

Bryan Weingarten wrote:

> is this a bug in pyrex?
>
> the following pyrex code:
> if callback:
>
>
> generates this c code.  notice the if (__pyx_2 < 0).  shouldn't that 
> be if (__pyx_2 != 0) ?  this is failing for me.
> __pyx_2 = PyObject_IsTrue(__pyx_1);
> if (__pyx_2 < 0) {
> }
>
> of course the fix is easy... just compare the if with something explicit.
>
> bryan
>
>
>
>
>
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