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Sun Sep 18 03:20:08 CEST 2005 · https://mail.python.org/pipermail/python-dev/2005-September/056459.html

Is anyone truly attached to nested tuple function parameters; ``def
fxn((a,b)): print a,b``?  At one of the PyCon sprints Guido seemed
okay with just having them removed when Jeremy asked about ditching
them thanks to the pain they caused in the AST branch.  I personally
don't see them being overly useful thanks to assignment unpacking. 
Plus I don't think they are used very much (gut feeling, though, and
not based on any grepping).

Would anyone really throw a huge fit if they went away?  I am willing
to write a PEP for their removal in 2.6 with a deprecation in 2.5 if
people are up for it.  Otherwise I say they should definitely go in
Python 3.

-Brett

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[Python-Dev] removing nested tuple function parameters