Make calls that are missing args into partials? Create a new singleton sentinel NoArg to signify a missing arg to a partial. If you can create "NoArg", then you can make args that have no default always default to NoArg.
a = print(NoArg,end="\n\n-said the cat\n")
a("Meow. Feed Me.")
#Meow. Feed Me.
#
#-said the cat
def b(animal,sound):
print(f"{animal} goes {sound}")
c = b("Cat")
c("Meow")
#Cat goes Meow
c("Purr")
#Cat goes Purr