How do I write class objects to a file in binary mode?

[snippsat]

There are small database packages that is fine for this eg TinyDB or dataset.
I have tutorial about dataset here.

Can do test with TinyDB,will store and also do trick(**) to recreate class instantiating from DB.

>>> from tinydb import TinyDB, Query

>>> db = TinyDB('db.json')
>>> doggo = Dog("Spot", "Black and White", 2)
>>> fido = Dog("Fiff", "Brown", 4)

>>> db.insert(doggo.__dict__)
1
>>> db.insert(fido.__dict__)
2

>>> db.all()
[{'name': 'Spot', 'color': 'Black and White', 'age': 2}, {'name': 'Fiff', 'color': 'Brown', 'age': 4}]
>>> exit()

Now have date in db.json.
Load again.

>>> from tinydb import TinyDB, Query

>>> db = TinyDB('db.json')
>>> find = Query()
>>> doggo = db.search(find.name == 'Spot')[0]
>>> doggo
{'name': 'Spot', 'color': 'Black and White', 'age': 2}

# Now the trick,using data from DB to recreate the class
>>> doggo = Dog(**doggo)

>>> doggo.name
'Spot'
>>> doggo.color
'Black and White'