UserTypical3

db = sqlite3.connect('base.db') # подключаю бд
cur = db.cursor()


def add():
    for row in cur.execute('SELECT * FROM users'):
        Name = row['Name']
        Balance = row['Balance']
        WeekSalary = row['WeekSalary']
        summa = Balance+WeekSalary
        cur.execute("UPDATE users SET Balance = {} WHERE Name = {}".format(summa, Name))
        db.commit()

import sqlite3

db = sqlite3.connect('base.db')
cursor = db.cursor()

def  add():
    a = 1
    cursor.execute('INSERT INTO base(number) VALUES("{}")'.format(a))

def change():
    pass

add()

import sqlite3

def  add(cursor):
    a = 1
    cursor.execute('INSERT INTO base(number) VALUES("{}")'.format(a))

def change(cursor):
    pass

if __name__ == "__main__":
    db = sqlite3.connect('base.db')
    cursor = db.cursor()
    add(cursor)