python read venv value or all keys into a dictionary

read_env.py

from typing import Dict, Union


def read_env(key: str = False, default_value: str = '') -> Union[str, Dict[str, str]]:
    """
    Open the venv/pyvenv.cfg file for reading and return a key value or all the settings
    :param key:
    :param default_value:
    :return:
    """
    with open("venv/pyvenv.cfg", "r") as f:
        lines = f.readlines()

    pairs = {key: value for key, value in (line.split(" = ") for line in lines)}

    if key is not False:
        return pairs.get(key, default_value)

    return pairs

Sample usage

from read_env import read_env


def print_hi(name):
    print(f'=== {name} ===')

    rtv = read_env('test', 'some default value')
    all_env = read_env()

    print(f'rtv: {rtv}')
    print('all_env:')
    print(all_env)


# Press the green button in the gutter to run the script.
if __name__ == '__main__':
    print_hi('Sample python main.py file')