[Pythonmac-SIG] \r in string causes eval to fail

[Chris Barker]

Michael Hudson wrote:

> Semi-seriously, I'd guess that everyone who's bumped into this has
> found it easier to normalize the line feeds in Python than hack the
> parser (it's a little scary).

Would you need to hack the parser? I'd be inclined to simply put a 
filter in before the parser, just like I'd do in user code:

CodeString = FixLineFeeds(CodeString)
eval(CodeString)

There would be a performance issue, because you'd be doing processing 
and copying of the string before parsing it, but I wonder how often 
performance is an issue when using eval and friends.

Another question: Is there any chance that having eval and friends "fix" 
linefeeds would break existing code? I'm thinking not, but perhaps I'm 
not very imaginative. This is an issue that made universal newlines 
support in files a little more awkward.

-Chris

-- 
Christopher Barker, Ph.D.
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