[Python-bugs-list] [ python-Bugs-495978 ] It's the future for generators

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Bugs item #495978, was opened at 2001-12-21 17:17
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Category: Python Interpreter Core
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Tim Peters (tim_one)
Assigned to: Nobody/Anonymous (nobody)
Summary: It's the future for generators

Initial Comment:
"from __future__ import generators" should no longer 
be required in 2.3a1.  Such stmts should also be 
removed from the Python library (there's a script 
under Tools to automate this).

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>Comment By: Tim Peters (tim_one)
Date: 2002-03-22 16:22

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The internal future machinery has changed every time we've 
added a new future gimmick.  So there's really nothing to 
be said other than to scour the source code looking for now-
obsolete "stuff".  For example, it's possible that the 
kinds of parser changes made for "yield" will never happen 
again, and, even if they do, I think it's impossible to 
predict where and how the parser will need to be unchanged.

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Comment By: Guido van Rossum (gvanrossum)
Date: 2002-03-22 16:13

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There ought to be documentation on what to do when an
optional feature becomes mandatory. Maybe a block comment or
docstring in __future__.py?


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Comment By: Tim Peters (tim_one)
Date: 2002-03-22 15:34

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Neil, if you don't enjoy using the patch system for 
straightforward stuff like this, don't feel compelled to 
use it.  That is, just check it in.

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Comment By: Neil Schemenauer (nascheme)
Date: 2002-03-22 15:04

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The attached patch removes the "yield is an optional keyword"
hacks from the parser.  It's not a complete fix for this
bug though.

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