On Mon, 10 Aug 2009 08:21:03 -0700, Douglas Alan wrote:

> But you're right, it's too late to change this now.

Not really. There is a procedure for making non-backwards compatible 
changes. If you care deeply enough about this, you could agitate for 
Python 3.2 to raise a PendingDepreciation warning for "unexpected" escape 
sequences like \z, Python 3.3 to raise a Depreciation warning, and Python 
3.4 to treat it as an error.

It may even be possible to skip the PendingDepreciation warning and go 
straight for Depreciation warning in 3.2.


-- 
Steven
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