an overly complicated example to illustrate: https://docs.python.org/3/tutorial/controlflow.html#unpacking-argument-lists

dict-to-args.py

#!/bin/python3

import os
from faker import Faker
from faker.providers import internet, lorem
from tabulate import tabulate

fake = Faker()
fake.add_provider(internet)
fake.add_provider(lorem)


def set_os_env(key: str, value: str):
    os.environ[key] = value


def db_config() -> dict:
    return {
        'database': os.getenv('DB_SCHEMA'),
        'user':     os.getenv('DB_USERNAME'),
        'password': os.getenv('DB_PASSWORD'),
        'host':     os.getenv('DB_HOSTNAME'),
        'port':     os.getenv('DB_PORT')
    }


class Connection:
    def __init__(self, database: str, user: str, password: str, host: str, port: str) -> None:
        self.db_schema = database
        self.db_username = user
        self.db_password = password
        self.db_hostname = host
        self.db_port = port

    def __str__(self) -> str:
        header = ['key', 'value']
        data = [
            ['DB_SCHEMA', self.db_schema],
            ['DB_USERNAME', self.db_username],
            ['DB_PASSWORD', self.db_password],
            ['DB_HOSTNAME', self.db_hostname],
            ['DB_PORT', self.db_port],
        ]
        return tabulate(tabular_data=data, headers=header)


set_os_env('DB_SCHEMA', f'{fake.word()}-db')
set_os_env('DB_USERNAME', fake.user_name())
set_os_env('DB_PASSWORD', fake.pystr())
set_os_env('DB_HOSTNAME', f'http://{fake.hostname()}')
set_os_env('DB_PORT', str(fake.port_number()))

conf = db_config()

print(conf)

conn = Connection(**conf)

print(conn)

std

{'database': 'begin-db', 'user': 'clawson', 'password': 'qQnkYSZOixookbgLoBax', 'host': 'http://laptop-29.morris.com', 'port': '59863'}
key          value
-----------  ---------------------------
DB_SCHEMA    begin-db
DB_USERNAME  clawson
DB_PASSWORD  qQnkYSZOixookbgLoBax
DB_HOSTNAME  http://laptop-29.morris.com
DB_PORT      59863