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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def from_env_vars(self) -> None: """Load values from environment variables. Keys must start with `KUYRUK_`."""

        for key, value in os.environ.items():
            if key.startswith('KUYRUK_'):
                key = key[7:]
                if hasattr(Config, key):
                    try:
                        value = ast.literal_eval(value)
                    except (ValueError, SyntaxError):
                        pass

                    self._setattr(key, value)