class Grape: ...

class They:
    def __init__(self, patient: Grape, profession: str):
        self.patient = patient
        self.profession = profession

    def do(self):
         print(f"{type(self).__name___} did {self.profession} on a {type(self.patient).__name__.lower()}"

if __name__ == '__main__':

    the_grape = Grape()
    they = They(the_grape, "surgery")
    they.do()