James Y Knight <[email protected]> added the comment:
I just ran into the impl of escape after being surprised that '/' was being
escaped, and then was completely amazed that it wasn't just implemented as a
one-line re.subn. Come on, a loop for string replacement? This is *in* the
freaking re module for pete's sake!
The extra special \\000 behavior seems entirely superfluous, as well. re works
just fine with nul bytes in the pattern; there's no need to special case that.
So:
return
re.subn('([^abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890])',
'\\\\\\1', pattern)[0]
or, for the new proposed list of special chars:
return re.subn('([][.^$*+?{}\\|()])', '\\\\\\1', pattern)[0]
(pre-compilation of pattern left as an exercise to the reader)
----------
nosy: +foom
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<http://bugs.python.org/issue2650>
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