[Tutor] Help on RE

[tee chwee liong]

thanks for making me understand more on re. re is a confusing topic as i'm starting on python. 
 
> Date: Sat, 22 Jan 2011 16:55:37 -0800
> From: steve at alchemy.com
> To: tcl76 at hotmail.com
> CC: tutor at python.org
> Subject: Re: [Tutor] Help on RE
> 
> 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+
> 
> 
> 
> 
> -- 
> Steve Willoughby | Using billion-dollar satellites
> steve at alchemy.com | to hunt for Tupperware.
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/tutor/attachments/20110123/d6f03d41/attachment.html>