saving (in text or binary) an object under a defined class

[snippsat]

A look how to use this with TinyDb.
Can also mention dataset my tutorial,both of this make it easier to work with small databases.

First i gone fix the class a little,to make it more usable for use with TinyDb
This mean that can take data from TinyDB and use the class.
Will also have the power of TinyDB to eg Query(search).
See that i use self.fname = fname no shortcut,this will make it easier to insert data(Users(**user_1)) from TinyDb to use class.

class Users:
    def __init__(
        self, obj_name, fname, lname, bday, username, password, domain="gmail"):
        self.obj_name = obj_name
        self.fname = fname
        self.lname = lname
        self.bday = bday
        self.username = username
        self.password = password
        self.domain = domain

    @property
    def fullname(self):
        return f"{self.fname}  {self.lname}"

    @property
    def email(self):
        return f"{self.fname.lower()}_{self.lname.lower()}@{self.domain}.com"

    def __str__(self):
        return f"""\
            The following is the info for user {self.username}:
            First Name: {self.fname}
            Last Name: {self.lname}
            Birthdate: {self.bday}
            Email: {self.fname}_{self.lname}@{self.domain}.com
        """

    def __repr__(self):
        return (f'Users({self.obj_name}, {self.fname}, {self.lname}, '+
                f'{self.bday}, {self.username}, {self.password}, {self.domain})')

# --| Test users
# user_1 = Users('user_1', 'Adam', 'Smith', '1/1/2000', 'adam1100', 1234)
# user_2 = Users('user_2', 'Kent', 'Hollow', '5/5/1970', 'kent1200', 4567)

A quick example of __str__ and __repr__ that i put in.

λ ptpython -i db_test.py
>>> user_1 = Users('user_1', 'Adam', 'Smith', '1/1/2000', 'adam1100', 1234)

>>> # Use of __repr__
>>> user_1
Users(user_1, Adam, Smith, 1/1/2000, adam1100, 1234, gmail)

>>> # Use of __str__
>>> print(user_1)
            The following is the info for user adam1100:
            First Name: Adam
            Last Name: Smith
            Birthdate: 1/1/2000
            Email: [email protected]

Use TinyDb,see that i pass in a dictionary with use of __dict__.

λ ptpython -i db_test.py
>>> from tinydb import TinyDB, Query

>>> db = TinyDB('db.json')
>>> user_1 = Users('user_1', 'Adam', 'Smith', '1/1/2000', 'adam1100', 1234)
>>> user_2 = Users('user_2', 'Kent', 'Hollow', '5/5/1970', 'kent1200', 4567)

>>> db.insert(user_1.__dict__)
1
>>> db.insert(user_2.__dict__)
2
>>> exit()

Now i want to use data from database to use the class and also have the option to use TinyDb directly.

λ ptpython -i db_test.py
>>> from tinydb import TinyDB, Query

>>> db = TinyDB('db.json')
>>> User = Query()

# Now take data from DB and instantiate user_1 
>>> user_1 = db.search(User.obj_name == 'user_1')[0]
>>> user_1 = Users(**user_1)

>>> user_1
Users(user_1, Adam, Smith, 1/1/2000, adam1100, 1234, gmail)

# Now is class workings with data from DB.
>>> user_1.email
'[email protected]'

>>> user_1.fullname
'Adam  Smith'

TinyDb directly:

>>> db.search(User.lname == 'Hollow')
[{'obj_name': 'user_2', 'fname': 'Kent', 'lname': 'Hollow', 'bday': '5/5/1970', 'username': 'kent1200', 'password': 4567, 'domain': 'gmail'}]


>>> db.all()
[{'obj_name': 'user_1', 'fname': 'Adam', 'lname': 'Smith', 'bday': '1/1/2000', 'username': 'adam1100', 'password': 1234, 'domain': 'gmail'}, {'obj_name': 'user_2', 'fname': 'Kent', 'lname': 'Hollow', 'bday': '5/5/1970', 'username': 'kent1200', 'password': 4567, 'domain': 'gmail'}]


>>> db.all()[1]
{'obj_name': 'user_2', 'fname': 'Kent', 'lname': 'Hollow', 'bday': '5/5/1970', 'username': 'kent1200', 'password': 4567, 'domain': 'gmail'}