argparse.ArgumentError: argument --browser: conflicting option string: --browser

[kingswangxu]

E:\BaiduNetdiskWorkspace\SeleniumBase-master\examples>pytest my_first_test.py --demo
Traceback (most recent call last):
File "c:\users\admin\appdata\local\programs\python\python37\lib\runpy.py", line 193, in run_module_as_main
"main", mod_spec)
File "c:\users\admin\appdata\local\programs\python\python37\lib\runpy.py", line 85, in run_code
exec(code, run_globals)
File "c:\users\admin\AppData\Local\Programs\Python\Python37\Scripts\pytest.exe_main.py", line 7, in
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init.py", line 185, in console_main
code = main()
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init_.py", line 143, in main
config = prepareconfig(args, plugins)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init.py", line 319, in _prepareconfig
pluginmanager=pluginmanager, args=args
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\hooks.py", line 286, in call
return self._hookexec(self, self.get_hookimpls(), kwargs)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\manager.py", line 93, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\manager.py", line 87, in
firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\callers.py", line 203, in multicall
gen.send(outcome)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\helpconfig.py", line 100, in pytest_cmdline_parse
config: Config = outcome.get_result()
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\callers.py", line 80, in get_result
raise ex[1].with_traceback(ex[2])
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages\pluggy\callers.py", line 187, in multicall
res = hook_impl.function(*args)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init.py", line 1003, in pytest_cmdline_parse
self.parse(args)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init.py", line 1283, in parse
self.preparse(args, addopts=addopts)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config_init.py", line 1176, in _preparse
args, namespace=copy.copy(self.known_args_namespace)
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config\argparsing.py", line 146, in parse_known_args
return self.parse_known_and_unknown_args(args, namespace=namespace)[0]
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config\argparsing.py", line 155, in parse_known_and_unknown_args
optparser = self._getparser()
File "c:\users\admin\appdata\local\programs\python\python37\lib\site-packages_pytest\config\argparsing.py", line 122, in _getparser
arggroup.add_argument(*n, **a)
File "c:\users\admin\appdata\local\programs\python\python37\lib\argparse.py", line 1373, in add_argument
return self._add_action(action)
File "c:\users\admin\appdata\local\programs\python\python37\lib\argparse.py", line 1577, in _add_action
action = super(_ArgumentGroup, self)._add_action(action)
File "c:\users\admin\appdata\local\programs\python\python37\lib\argparse.py", line 1387, in _add_action
self._check_conflict(action)
File "c:\users\admin\appdata\local\programs\python\python37\lib\argparse.py", line 1526, in _check_conflict
conflict_handler(action, confl_optionals)
File "c:\users\admin\appdata\local\programs\python\python37\lib\argparse.py", line 1535, in _handle_conflict_error
raise ArgumentError(action, message % conflict_string)
argparse.ArgumentError: argument --browser: conflicting option string: --browser

E:\BaiduNetdiskWorkspace\SeleniumBase-master\examples>

ask for help!

[mdmintz]

Hi @kingswangxu, that error occurs when the same pytest command-line argument is being defined in more than two places. Have you previously installed a framework that has --browser defined as one of the available options? Or are you trying to define extra arguments in a custom conftest.py file? You can get around this by installing SeleniumBase in a new virtual environment if you can't figure out where the other definitions are defined. Or if you can find the other location where --browser is defined, then just remove that definition. If another framework/library has it, pip uninstall it. Command-line arguments can only be defined once per argument.

[kingswangxu]

thank you, i will get a new virtual environment

[STARKILLER-1]

Had same issue, thank you