missing 1 required positional argument: 'self'

[snippsat]

my question how can i append my dictionary from inputs coming from :idphone?

Here a smaller version with some fixes and a shortcut to making the dictionary

class Phone:
    def __init__(self, firstname, mobile):
        self.firstname = firstname
        self.mobile = mobile

    def __str__(self):
        return f"First Name: {self.firstname}\nMobile No: {self.mobile}"

Usage test:

>>> id_phone = Phone('Kent', 1122334455)
>>> id_phone.mobile
1122334455
>>> 
>>> print(id_phone)
First Name: Kent
Mobile No: 1122334455
>>> 
>>> phonenote = id_phone.__dict__
>>> phonenote
{'firstname': 'Kent', 'mobile': 1122334455}
>>> phonenote['mobile']
1122334455