How to use python regular expression to substitute string value

[Allerdyce.John at gmail.com]

Thanks. But i don't understand why I need to do this:
x. . area = map (lambda x: int(x), re.findall (pattern, line)[0]

if i have the value already by doing this:
 x, y, width, height, area = re.findall(pattern, line)[0]
print "rect x=\"%(x)s\" y=\"%(y)s\" width=\"%(width)s\"
height=\"%(height)s\" ..." % locals()