问TypeError: find_one_and_update()缺少一个必需的位置参数：“update”

EN

TypeError: find_one_and_update() missing 1 required positional argument: 'update'

import pymongo
from pymongo import ReturnDocument
import datetime
from animalsCRUD import AnimalShelter

#username = "aacuser"
#password = "password"

insertRec = AnimalShelter("aacuser", "password")
locateRec = AnimalShelter("aacuser", "password")
updateRec = AnimalShelter("aacuser", "password")
deleteRec = AnimalShelter("aacuser", "password")

animal = ({"age_upon_outcome":"5 years", "animal_id":"A333333", "animal_type":"Dog", 
"breed":"Derp", "color":"White",
"date_of_birth":"07/19/19", "datetime": datetime.datetime.now(), "name":"", 
"outcome_subtype":"Foster",
"outcome_type":"Adoption", "sex_upon_outcome":"Intact Female", "location_lat":30.60784677,
"location_long":-97.35087807, "age_upon_outcome_in_weeks":64.24642857})

critter = {"animal_id":"A333333"}

changeCritter = ({"animal_id": "A333333"}, {'$set': {'animal_type': 'Cat'}})

print(insertRec.create(animal))


locateRec.locate(critter)

updateRec.update(changeCritter)

locateRec.locate(critter)

deleteRec.delete(critter)