帮助命令接口

ascend-fd -h

ascend-fd --help

usage: ascend-fd [-h] {version,parse,diag} ...

Ascend Fault Diag

positional arguments:
  {version,parse,diag}
    version             show ascend-fd version
    parse               parse origin log files
    diag                diag parsed log files

optional arguments:
  -h, --help            show this help message and exit