[Tutor] Help on RE

[Steve Willoughby]

On Sun, Jan 23, 2011 at 12:38:10AM +0000, tee chwee liong wrote:
> i have a set of data and using re to extract it into array. however i only get positive value, how to extract the whole value including the -ve sign? 
>     numbers = re.findall("\d+", line)

The \d matches a digit character.  \d+ matches one or more digit characters. 
Nothing in your regex matches a sign character.  You might want something like 
   [-+]\d+
which would require either a - or + followed by digits.  If you want the sign
to be optional, maybe this would work:
   [-+]?\d+




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