main_run.py

pytest.main(['-s', '-v','--browser=chrome-headless', 'test_case'])

conftest.py

def pytest_addoption(parser):
parser.addoption("--browser",
action="store",
dest="browser",
default='chrome',
choices=['chrome', 'firefox', 'ie'],
help="定义运行的浏览器，包括chrome、firefox和ie")

@pytest.fixture(scope='session', autouse=True)
def browser(request):
browser_type = request.config.getoption("browser")
global driver
'''定义全局driver参数'''
if driver is None:
with allure.step("打开浏览器"):
driver = BaseDriver(browser_type).driver
yield driver
with allure.step("关闭浏览器"):
driver.close()
报错信息：
error: unrecognized arguments: --browser