python3 compatibility fix
From [P3 what's new page](http://docs.python.org/3.0/whatsnew/3.0.html)
string.letters and its friends (string.lowercase and string.uppercase) are gone. Use string.ascii_letters etc. instead. (The reason for the removal is that string.letters and friends had locale-specific behavior, which is a bad idea for such attractively-named global “constants”.)
| author |
Catalin Costache <catacgc@gmail.com> |
| date |
Mon, 23 Dec 2013 01:02:52 +0200 |
| parents |
2fed070f9fad |
| children |
(none) |
.DS_Store
*.pyc
*.swp
*.swo
*.un~
.ropeproject
tags
*.t.err