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How to use _replace_env method in tox

Best Python code snippet using tox_python

test_config.py

Source:test_config.py

...232class TestReplaceEnv:233    """Unit tests for nemo_nowcast.config.Config._replace_env load method.234    """235    @patch.dict("nemo_nowcast.config.os.environ", {"foo": "bar"})236    def test_replace_env(self):237        var = Mock(name="re_var", group=Mock(return_value="foo"))238        value = Config._replace_env(var)239        assert value == "bar"240    def test_envvar_not_set(self):241        var = Mock(name="re_var", group=Mock(return_value="foo"))242        with pytest.raises(KeyError):...

config.py

Source:config.py

...20    for i, value in enumerate(obj):21        obj[i] = _walk_object(value, callback)22    return obj23def convert_env_vars(config):24    def _replace_env(s):25        if isinstance(s, basestring) and s.startswith('_env:'):26            return os.environ.get(s[5:], '!ENV_NOT_FOUND')27        return s28    return _walk_object(config, _replace_env)29_config = None30def load():31    global _config32    if _config is not None:33        return _config34    data = None35    config_file = os.environ.get('DOCKER_REGISTRY_CONFIG', 'config.yml')36    config_path = os.path.join(os.path.dirname(__file__), '..', config_file)37    with open(config_path) as f:38        data = yaml.load(f)...

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