[Python-3000] IDLE in new py3k

["Martin v. Löwis"]

> But the reason we got here was that an AsString() call failed. Why?

The only reason I can see is that PyObject_Str failed; that may happen
if PyObject_Str fails. That, in turn, can happen for bytes objects
if they are not UTF-8.

I think _tkinter should get rid of AsString, and use the Tcl object
API instead (not sure how to do that specifically, though)

> Here's the traceback:

Are you sure these are related? This traceback looks like a Tcl
error - so what does that have to do with AsString?

Regards,
Martin