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?

[wookayin]

semshi would work if the filetype is python, because it's supposed to be activated upon FileType python event. How did you install and load the plugin, by any chance?

Does it happen only when if you open the python file as the startup argument (e.g. vim bin/python-script)?