def _variable_substitution()

in dusty/models/config.py [0:0]

• 13 lines of code
• 8 McCabe index (conditional complexity)

    def _variable_substitution(self, obj):
        """ Allows to use raw environmental variables inside YAML/JSON config """
        if isinstance(obj, dict):
            for key in list(obj.keys()):
                obj[self._variable_substitution(key)] = \
                    self._variable_substitution(obj.pop(key))
        if isinstance(obj, list):
            for index, item in enumerate(obj):
                obj[index] = self._variable_substitution(item)
        if isinstance(obj, str):
            if re.match(r"^\$\![a-zA-Z_][a-zA-Z0-9_]*$", obj.strip()) \
                    and obj.strip()[2:] in os.environ:
                return os.environ[obj.strip()[2:]]
        return obj