Hello Mr Kiefner,

after installing pip and fuzzylogic on a new set up Manjaro OS I tested some old code of mine, using your fuzzy logic.

I observed an issue in the "call" function from the "fuzzylogic/classes.py":
Line 447 "index = sum(v.center_of_gravity * x for v, x in weights) / sum(x for v, x in weights)" threw a TypeError: unsupported operand type(s) for *: 'method' and 'float'

After looking over the code I noticed a missing "()" after the "v.center_of_gravity" function call. With this little change it worked as usual.

I'm not sure why I observed this error just now, maybe it's some bug with installing it on a Manjaro OS, but may you look over it.

Best regards and thanks for this awesome library
Robyn Gehler