用于多路径复制的python编程和从默认路径读取

Question

我正在处理默认路径中的文件，然后阅读以进行验证。如果读取失败，我需要备份副本再次在默认路径中复制，然后阅读。

现在的逻辑如下，任何人都可以建议在备份路径中复制语法，然后在失败的情况下从bakcup复制到默认值吗？

    #Copying the dump
    cpdump = "cp -rf "+dumpconst.HMC_DEFAULT_DUMP_OFFLOAD_PATH + i_dump_name + \
                                                               " "+destPath
    self.TestLog("Copying dump file "+i_dump_name+" to path==>"+destPath)

    try:
        l_fw_con.su_command(suid, destName, suPasswd,cpdump,suIdPasswd)
    except LcbCommandsError,e:
        raise DumpHelperError(FWErrors.SYSDUMP_SETUP_ERROR,\
                "Unable to copy the dump file.Reason:"+e.Reason)
    except SshConnectionError,e:
        raise DumpHelperError(FWErrors.SYSDUMP_SETUP_ERROR,e.Reason)

    self.TestLog("Dump file copy to mount path==>[COMPLETED]")

    dump_verify_tool = dumpconst.DUMP_VERIFICATION_TOOL_DIR + \
                              dumpconst.DUMP_VERIFICATION_UTIL

    self.TestLog("Dump content verification==>[IN PROGRESS]")

    #Run the content verification
    try:
        cmd = dump_verify_tool + mountPoint+"/dumps/"+i_dump_name
        l_result = lcbcmd.suLcbExecute(cmd)
    except (LcbConnectionError, LcbCommandsError) as e:
        self.ErrorLog(str(e))
        raise DumpHelperError(FWErrors.SYSDUMP_SETUP_ERROR,\
                              "Dump verification tool execution failed. " +
                              "Reason: " + e.Reason)