It would be useful if the variable names in routing rules could begin
with an underscore (just as Python variables can). I don't see that it
would break anything, and it's a one-character fix:
diff -r 92c738ae0044 werkzeug/routing.py
--- a/werkzeug/routing.py Thu Sep 16 21:16:57 2010 +0200
+++ b/werkzeug/routing.py Sat Oct 09 16:55:24 2010 -0400
@@ -116,7 +116,7 @@
(?:\((?P<args>.*?)\))? # converter arguments
\: # variable delimiter
)?
- (?P<variable>[a-zA-Z][a-zA-Z0-9_]*) # variable name
+ (?P<variable>[a-zA-Z_][a-zA-Z0-9_]*) # variable name
>
''', re.VERBOSE)
_simple_rule_re = re.compile(r'<([^>]+)>')
(BTW, the registration on the Werkzeug Trac is broken.)
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