get rid of comparison with None
treef3273dae0cc7bbbdd59da311c61b3b39f7ac2598
-rw-r--r-- 143 AUTHORS
-rw-r--r-- 45804 CHANGES
-rw-r--r-- 4282 INSTALL
-rw-r--r-- 15145 LICENSE
-rw-r--r-- 402 MANIFEST.in
-rw-r--r-- 1449 README
-rw-r--r-- 3810 TODO
drwxr-xr-x - contrib
drwxr-xr-x - design
drwxr-xr-x - examples
drwxr-xr-x - faq
drwxr-xr-x - gallery
drwxr-xr-x - manual
drwxr-xr-x - pyx
-rw-r--r-- 662 setup.cfg
-rwxr-xr-x 3274 setup.py
drwxr-xr-x - test
drwxr-xr-x - www