Some python files aren't detected

[mjbrowns]

So, I have several files that come up without semshi enabled. Some do. I can't for the life of me figure out why.

Sometimes my files are named .py, sometimes not. I pretty much always use a shebang: #!/usr/bin/env python3

But it can't figure out why sometimes it comes up enabled and other times it doesn't. if I do :set filetype it shows python is detected, but it's just using the default highlighter not semshi.

Any ideas?