def system(str_cmd):try:status = subprocess.run(str_cmd, shell=True)except AttributeError:status = subprocess.call(str_cmd, shell=True)return statusdef system2(str_cmd):bytes_stdout = subprocess.check_output(str_cmd, shell=True)return bytes_stdout.decode("utf8")  # rstrip("\n")def _D_os_release_version():  # deprecatedstr_shell = [# 方法1: lsb_release -a"lsb_release -i | awk '{print $3}' ",# 方法2: cat /etc/issue"cat /etc/issue | awk '{print $1}' ",# 方法3: cat /etc/redhat-release  # for centos/fedora"cat /etc/redhat-release"  # 未测试??
    ]def trying(index):try:os_version = system2(str_shell[index])return os_version if os_version else Noneexcept Exception as e:logging.exception("os_release_version() -->> {}".format(e))trying(index + 1)trying(0)def os_release_version():try:# 方法1: lsb_release -astr_shell = "lsb_release -i | awk '{print $3}' "os_version = system2(str_shell)except subprocess.CalledProcessError:  # 不存在 lsb_release 命令logging.debug("os_release_version() -->> 不存在'lsb_release'命令，非Debian系列发行版")# 方法2: cat /etc/issueif os.path.exists("/etc/issue"):str_shell = "cat /etc/issue | awk '{print $1}' "# 方法3: cat /etc/redhat-release  # for centos/fedoraelif os.path.exists("/etc/redhat-release"):str_shell = "cat /etc/redhat-release"  # 未测试??else:# 未查询到当前系统的类型/发行版logging.warn("os_release_version() -->> 未知的操作系统发行版")system("uname -a")return Nonetry:os_version = system2(str_shell)except Exception as e:logging.error("os_release_version() -->> {}".format(e))os_version = os_version.rstrip("\n").lower() if os_version else Nonereturn os_version