Here's a pyparsing version of this, that may be easier to maintain long term (although if you have your heart set on learning regexp's, they will certainly do the job). Note that in pyparsing, you don't have to spell out where the whitespace goes - pyparsing's default logic assumes that whitespace may be found between any grammar elements, and if found, it is ignored. (I believe regexp has a special magic symbol that will do the same thing.)
Download pyparsing at http://pyparsing.sourceforge.net. -- Paul import pyparsing as pp testString = ' 1 2 3' integer = pp.Word(pp.nums) lineData = pp.OneOrMore( integer ) results = lineData.parseString( testString ) print results will print: ['1', '2', '3'] -- http://mail.python.org/mailman/listinfo/python-list