Command os.system with ability to enter and leave directory using 'with' statement

shell_command.py

class Shell:

    def __init__(self, cd_path):
        self.cd_path = cd_path
        self.exit_path = os.getcwd()

    def __enter__(self):
        os.chdir(self.cd_path)

    def __exit__(self):
        os.chdir(self.exit_path)

    @staticmethod
    def system(command):
        """
        Execute command and check return code
        """
        logger.info(command)
        ret_code = os.system(command)
        if ret_code != 0:
            logger.warning("{} return code is {}".format(command, ret_code))
            sys.exit(1)