def __init__(selfnamemonthdayyearspeaktext)self name name self month month self day day self year year self speaktext speaktext this is an accessor method that returns the speaktext stored in the object notice that "selfis parameter every method has "selfas its first parameter the "selfparameter is reference to the current object the current object appears on the left hand side of the dot ( the when the method is called def speak(self)return self speaktext here is an accessor method to get the name def getname(self)return self name this is another accessor method that uses the birthday information to return string representing the date def birthdate(self)return str(self month"/str(self day"/str(self year this is mutator method that changes the speaktext of the dog object def changebark(self,bark)self speaktext bark when creating the new puppy we don' know it' birthday pick the first dog' birthday plus one year the speaktext will be the concatenation of both dog' text the dog on the left side of the operator is the object referenced by the "selfparameter the "otherdogparameter is the dog on the right side of the operator def __add__(self,otherdog)return dog("puppy of self name and otherdog nameself monthself dayself year self speaktext otherdog speaktext def main()boydog dog("mesa" "woooof"girldog dog("sequoia" "barkbark"print(boydog speak()print(girldog speak()print(boydog birthdate()print(girldog birthdate()boydog changebark("woofywoofy"print(boydog speak()puppy boydog girldog print(puppy speak()print(puppy getname()print(puppy birthdate() if __name__ ="__main__"main(this text uses operator overloading fairly extensively there are many operators that are defined in python python programmers often call these operators magic methods because method automatically gets called when an operator is used in an expression many of the common operators are given in the table in fig for your this copy belongs to 'acha