How to print the values of keys here?

I gave some values & keys in a dictionary & showed the value of two keys present here.

def save_user_1(**user):
    return user["id"], user["mail"]

print(save_user_1(id = 1, name = "john", mail = "save_user_1@gmail.com"))

Output : (1, ‘save_user_1@gmail.com’)

1.Why does it show the output as a tuple here?

2.How can I get the values of keys here ?(The oppposite of what showed in the output)

>Solution :

1. To get a list as output, use brackets : return [user["id"], user["mail"]]
2. You can try user.keys() to get the dictionary keys, or user.items() to get both keys and values :

def save_user_1(**user):
    print('user keys', user.keys())
    for key, value in user.items():
        print("key =", key, ", value =", value)
    return user["id"], user["mail"]

print(save_user_1(id = 1, name = "john", mail = "save_user_1@gmail.com"))

output :

user keys dict_keys(['id', 'name', 'mail'])
key = id , value = 1
key = name , value = john
key = mail , value = save_user_1@gmail.com
(1, 'save_user_1@gmail.com')