On Thu, 17 Apr 2008 12:25:51 +1000, Daniel Fetchinson <[EMAIL PROTECTED]> wrote:
>> yes, there's a thread with the same title, but I believe mine is more >> appropriate title. >> so, as much as I search on the web, read manuals, tutorials, mail-lists >> (including this one) I cannot figure it out how to search a string in a >> list of lists. >> like this one: >> >> someList = [['somestring', 1, 2], ['oneother', 2, 4]] >> >> I want to search "somestring" in someList which is in practice a list >> of aprox. 200 lists. (hey, I'm a newbie python programmer, don't judge >> me). >> is the list.index the wrong approach? >> should I use numpy, numarray, something else? >> can anyone, be kind and help me with this? > > someList = [['somestring', 1, 2], ['oneother', 2, 4]] > for alist in someList: > if alist[0] == 'somestring': > print "Found it at index %d" % someList.index( alist ) > # if you know it will only occur once you might say: > break > > HTH, > Daniel See also Section 4.5. Filtering Lists. List comprehension: [x for x in someList if x[0] == 'somestring'] Use filter() function: filter(lambda x: x[0] == 'somestring', someList) -- Kam-Hung Soh <a href="http://kamhungsoh.com/blog";>Software Salariman</a> -- http://mail.python.org/mailman/listinfo/python-list
