Got it. After putting commas, it works (The 'o' was a mistake when I posted, sorry about it ).
Thanks to all of you :) On Mar 5, 5:12 pm, Dennis Lee Bieber <wlfr...@ix.netcom.com> wrote: > On Fri, 4 Mar 2011 20:08:21 -0800 (PST), Vincent Ren > <renws1...@gmail.com> declaimed the following in > gmane.comp.python.general: > > > Hello, everyone, recently I am trying to learn python's > > multiprocessing, but > > I got confused as a beginner. > > > If I run the code below: > > > from multiprocessing import Pool > > import urllib2 > > otasks = [ > > 'http://www.php.net' > > 'http://www.python.org' > > 'http://www.perl.org' > > 'http://www.gnu.org' > > ] > > You've just defined a list with ONE element -- a string of: > > "http://www.php.nethttp://www.python.orghttp://www.perl.orghttp://http..."; > > Python concatenates adjacent strings -- which includes those on > multiple lines when inside an open ( [ { structure. > > You need to put commas after the closing quotes on those lines. > > > def f(url): > > return urllib2.urlopen(url).read() > > > pool = Pool(processes = 2) > > print pool.map(f, tasks) > > And I'm presuming the others are correct -- and that should be > > (f, otasks) > > > httplib.InvalidURL: nonnumeric port: '' > > No surprise... URL nomenclature expects a port number after the > second : in URL, and with concatenation you've got four : in a single > URL. > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/ -- http://mail.python.org/mailman/listinfo/python-list
