How to use the gunicorn.config.Config function in gunicorn

def test_bool_validation():
    c = config.Config()
    assert c.preload_app is False
    c.set("preload_app", True)
    assert c.preload_app is True
    c.set("preload_app", "true")
    assert c.preload_app is True
    c.set("preload_app", "false")
    assert c.preload_app is False
    pytest.raises(ValueError, c.set, "preload_app", "zilch")
    pytest.raises(TypeError, c.set, "preload_app", 4)

def test_get_username_handles_malformed_basic_auth_header():
    """Should catch a malformed auth header"""
    request = SimpleNamespace(headers=())
    response = SimpleNamespace(
        status='200', response_length=1024, sent=1024,
        headers=(('Content-Type', 'text/plain'),),
    )
    environ = {
        'REQUEST_METHOD': 'GET', 'RAW_URI': '/my/path?foo=bar',
        'PATH_INFO': '/my/path', 'QUERY_STRING': 'foo=bar',
        'SERVER_PROTOCOL': 'HTTP/1.1',
        'HTTP_AUTHORIZATION': 'Basic ixsTtkKzIpVTncfQjbBcnoRNoDfbnaXG',
    }
    logger = Logger(Config())

    atoms = logger.atoms(response, request, environ, datetime.timedelta(seconds=1))
    assert atoms['u'] == '-'

def test_prefix_multiple_dots():
    c = Config()
    c.set("statsd_prefix", "test...")
    logger = Statsd(c)
    logger.sock = MockSocket(False)

    logger.info("Blah", extra={"mtype": "gauge", "metric": "gunicorn.test", "value": 666})
    assert logger.sock.msgs[0] == b"test.gunicorn.test:666|g"

def test_always_use_configured_logger():
    c = config.Config()
    c.set('logger_class', __name__ + '.MyLogger')
    assert c.logger_class == MyLogger
    c.set('statsd_host', 'localhost:12345')
    # still uses custom logger over statsd
    assert c.logger_class == MyLogger

def test_defaults():
    c = config.Config()
    for s in config.KNOWN_SETTINGS:
        assert c.settings[s.name].validator(s.default) == c.settings[s.name].get()

def test_always_use_configured_logger():
    c = config.Config()
    c.set('logger_class', __name__ + '.MyLogger')
    assert c.logger_class == MyLogger
    c.set('statsd_host', 'localhost:12345')
    # still uses custom logger over statsd
    assert c.logger_class == MyLogger

def test_defaults():
    c = config.Config()
    for s in config.KNOWN_SETTINGS:
        assert c.settings[s.name].validator(s.default) == c.settings[s.name].get()

from gunicorn.config import Config

cfg = Config()
cfg.set('proxy_protocol', True)

request = {
    "method": "GET",
    "uri": uri("/stuff/here?foo=bar"),
    "version": (1, 0),
    "headers": [
        ("SERVER", "http://127.0.0.1:5984"),
        ("CONTENT-TYPE", "application/json"),
        ("CONTENT-LENGTH", "14")
    ],
    "body": b'{"nom": "nom"}'
}

def run(self, handler):
        from gunicorn.arbiter import Arbiter
        from gunicorn.config import Config
        handler.cfg = Config({'bind': "%s:%d" % (self.host, self.port), 'workers': 4})
        arbiter = Arbiter(handler)
        arbiter.run()