PyYAML列表顺序

Question

我有一个包含以下内容的yaml文件：

Filer_Po:
    - description <dsc_here>
    - switchport
    - switchport mode private-vlan trunk promiscuous
    - spanning-tree port type edge trunk
    - spanning-tree bpduguard enable
    - speed 10000
    - flowcontrol receive on
    - flowcontrol send on
    - mtu 9216
    - storm-control broadcast level 20.00
    - switchport private-vlan trunk native vlan 1093
    - switchport private-vlan trunk allowed vlan 1094,1099
    - switchport private-vlan mapping trunk 1093 1094
    - no lacp graceful-convergence
    - no shutdown

我使用以下代码加载文件：

with open(int_cmd_file, 'r') as stream:
    try:
        int_cmd_dic = yaml.load(stream)
    except yaml.YAMLError as exc:
        print(exc)

使用命令print json.dumps(int_cmd_dic, indent=4)我得到以下输出。

{
    "Filer_Po": [
        "description <dsc_here>",
        "switchport",
        "switchport mode private-vlan trunk promiscuous",
        "speed 10000",
        "no lacp graceful-convergence",
        "spanning-tree port type edge trunk",
        "spanning-tree bpduguard enable",
        "flowcontrol receive on",
        "flowcontrol send on",
        "mtu 9216",
        "storm-control broadcast level 20.00",
        "switchport private-vlan trunk native vlan 1093",
        "switchport private-vlan trunk allowed vlan 1094,1099",
        "switchport private-vlan mapping trunk 1093 1094",
        "no shutdown"
    ]
}

请注意，＆＃39;速度10000＆＃39;是列表中早于Yaml文件中定义的元素。如何维护定义的列表顺序？