save_dumps.py

import pickle


class Person:
    def __init__(self, first_name, last_name, age, gender):
        self.first_name = first_name
        self.last_name = last_name
        self.age = age
        self.gender = gender

    def __str__(self):
        return f"<Person name={self.first_name} {self.last_name}, age={self.age}, gender={self.gender}>"

p = Person("John", "Doe", 99, "Male")

# get the dumped bytes
dumped_p = pickle.dumps(p)
print(dumped_p)

# write them to a file
with open("person.pickle", "wb") as file:
    file.write(dumped_p)

# load it
with open("person.pickle", "rb") as file:
    p2 = pickle.loads(file.read())

print(p)
print(p2)