Hi, For a file with aaE aEE EaE I want to statically get the concurence of E, such as for coloumn 1, I wish it print a[0]=1, a[1]=1,a[2]=3. Thanks for suggestions, -- Best Regards, lina -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/tutor/attachments/20111004/3c13aa59/attachment.html>