Unexpected global variable behaviour

[RgeeK]

Thanks a lot Fredrik,

A big wave of deja vu came over me as I read your note. That bit me once 
before, and was my only previous run-in with the 'global' directive 
which clearly didn't stick with me. :(

Thanks for the concise, helpful reply. The universe makes sense again.

-Ross.




Fredrik Lundh wrote:
> http://docs.python.org/ref/naming.html
> 
> "If a name binding operation occurs anywhere within a code block, all 
> uses of the name within the block are treated as references to the 
> current block. This can lead to errors when a name is used within a 
> block before it is bound."
> 
> to fix this, use the global directive:
> 
> http://docs.python.org/ref/global.html
> 
>    def OnOutfileButton(self,evt):
>      global outXMLfile # flag variable as global
>      fPath, fName = os.path.split(fullName)
>      print "Selected output file:", fName
>      outXMLfile = fName
>      ...
> 
> </F>
>