Bengt Richter wrote:
On Sat, 26 Mar 2005 02:07:15 GMT, aaron <[EMAIL PROTECTED]> wrote:
pattern.sub(':', '375 mi. south of U.C.B is 3.4 degrees warmer.')
'375 mi: south of U:C:B is 3.4 degrees warmer:'
so this works, but not in the following case:
pattern.sub(':', '.3')
Brute force the exceptional case that happens at the start of the line?
>>> import re
>>> pattern = re.compile(r'^[.]|(?!\d)[.](?!\d)')
>>> pattern.sub(':', '375 mi. south of U.C.B is 3.4 degrees warmer.')
'375 mi: south of U:C:B is 3.4 degrees warmer:'
>>> pattern.sub(':', '.3')
':3'
>>> pattern.sub(':', '3.')
'3:'
Be careful... the OP has assumed something that isn't true,
and Bengt's fix isn't sufficient:
>>> import re
>>> s = 'x.3'
>>> pattern = re.compile(r'^[.]|(?!\d)[.](?!\d)')
>>> pattern.sub(':', '.3')
':3'
>>> pattern.sub(':', s)
'x.3'
So the OP's "this works" comment was wrong.
Suggestion: whip up a variety of automated test cases and
make sure you run them all whenever you make changes to
this code...
(No, I don't have a solution to the continuing problem,
other than to wonder whether the input data really requires
all these edge cases to be handled properly.)
-Peter
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