change some asserts for py2.6
change some asserts for py2.6

Autoplectic/dit,chebee7i/dit,chebee7i/dit,Autoplectic/dit,dit/dit,dit/dit,dit/dit,chebee7i/dit,Autoplectic/dit,Autoplectic/dit,dit/dit,dit/dit,chebee7i/dit,Autoplectic/dit