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How to use _venv_lookup_and_check_external_allowlist method in tox

Best Python code snippet using tox_python

venv.py

Source:venv.py

...163            path = cwd.join(name)164            if path.check():165                return str(path)166        if venv:167            path = self._venv_lookup_and_check_external_allowlist(name)168        else:169            path = self._normal_lookup(name)170        if path is None:171            raise tox.exception.InvocationError(172                "could not find executable {}".format(pipes.quote(name)),173            )174        return str(path)  # will not be rewritten for reporting175    def _venv_lookup_and_check_external_allowlist(self, name):176        path = self._venv_lookup(name)177        if path is None:178            path = self._normal_lookup(name)179            if path is not None:180                self._check_external_allowed_and_warn(path)181        return path182    def _venv_lookup(self, name):183        return py.path.local.sysfind(name, paths=[self.envconfig.envbindir])184    def _normal_lookup(self, name):185        return py.path.local.sysfind(name)186    def _check_external_allowed_and_warn(self, path):187        if not self.is_allowed_external(path):188            reporter.warning(189                "test command found but not installed in testenv\n"...

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