def clean_semver(cls, version_spec):
        return re.sub(r"([<>=~])\s+?v?", "\\1", version_spec, re.IGNORECASE)
def __getitem__(self, key):
        logger.debug("Get /%s config key", "/".join(self._path + (key,)))
        value = self._collection[key]
        return self._to_python(value)