Could this be used without the "bp."? Half the point of coming up with a nicer notation is for the notation to actually be nicer.
Also note that the _ placeholder isn't the only way that better_partial helps you. You can also use ... to indicate that you want to omit all arguments except ones you explicitly pass as kwargs. For instance:
from better_partial import partial, _
@partial
def f(a,b,c,d,e):
return (a,b,c,d,e)
f(_,_,3,_,_)(1,2,4,5) == f(..., c=3)(1,2,4,5)from better_partial import partial, _
presumably. Though since _ has some meaning in Python maybe you'd want to do
from better_partial import partial, _ as x
instead (or something like it).