如何从函数中的pytest固定装置获取返回值，所以我不需要使用附加参数调用此函数？

Question

I have the following fixture in conftest.py that returns an environment settings dictionary like user, password etc:

@pytest.fixture
def envparams(request):
    env = request.config.getoption("--env")
    return env_params[env]

Then I have module like:

def request_master_url(envparams):
    cje_master_url = envparams['url']+'/'+test_master
    cje_user = envparams['user']
    cje_pass = envparams['password']
    local = testinfra.get_host("ssh://localhost")
    results = local.command(
                        'curl -L -I --user '+cje_user+':'
                        + cje_pass+' '+cje_master_url+'| grep HTTP\
                        |tail -1').stdout
    if '200 OK' in results:
        return True
    else:
        return False

and a test that uses this module like:

def test_cje_high_availability(envparams, env_option, script_loc):
    workstation = testinfra.get_host('ssh://'+testinfra_hosts[0])
    if not security.request_master_url(envparams):
        print(test_master+' - is not available\n')
        create_team_master(test_master, envparams, script_loc)

Can I get rid of the envparams parameter from module function somehow so I can call it without additional parameter? like:

security.request_master_url(envparams)

I only need to setup this fixture once in a session. I tried to use:

@pytest.mark.usefixtures('envparams')
def request_master_url():

But, I am not sure how to get values returned from this fixture.

Answer 1

Well, I've done as hoefling suggested.

Created small function in conftest.py:

def get_env_params():
    env_name = pytest.config.getoption("--env")
    return env_params[env_name]

and call it from my module functions where needed. Example function looks like below:

def request_master_url(team_id):
    envparams = get_env_params()
    cje_master_url = envparams['url']+'/'+team_id
    cje_user = envparams['user']
    cje_pass = envparams['password']
    local = testinfra.get_host("ssh://localhost")
    results = local.command(
                        'curl -L -I --user '+cje_user+':'
                        + cje_pass+' '+cje_master_url+'| grep HTTP\
                        |tail -1').stdout
    if '200 OK' in results:
        return True
    else:
        return False

removed unnecessary fixture from many more functions and was able to clean my code a lot. Thanks!