httpx.Client not saving cookies to cookiesJar

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import pathlib

import httpx

from http.cookiejar import MozillaCookieJar


def main():
    jar_file = pathlib.Path(__file__).joinpath("../.httpx/test.cookiejar").resolve()

    jar = MozillaCookieJar(filename=jar_file)

    client = httpx.Client(cookies=jar)
    r = client.get('https://httpbin.org/cookies/set/1/2')
    print('response set-cookie header:', r.headers.get('set-cookie'))

    for key, value in client.cookies.items():
        print('cookies', f'{key=}', f'{value=}')

    jar.save()

    print(f'{jar_file.read_text()=}')


if __name__ == '__main__':
    main()