如何将此代码写入单行命令

Question

我有一个curl命令返回一些json结果.

{  
    "all":[  
    {
        "id":"1",
        "actions":[  
            "power",
            "reboot"
        ]
    },
    {
        "id":"2",
        "actions":[  
            "shutdown"
        ]
    },
    {
        "id":"3",
        "actions":[  
            "backup"
        ]
    }
    ]
} 

我使用此命令检索数据操作:

curl -s https://DOMAIN/API -H "X-Auth-Token: TOKEN" | python -c "import sys, json, re; print [ i['allowed_actions'] for i in json.load(sys.stdin)['servers']]"

但是我想在命令行的python中使用这段代码:

for i in json.load(sys.stdin)['all']:
    if i['id'] == '1':
        print(i['actions'])

我试过这个:

curl -s https://DOMAIN/API -H "X-Auth-Token: TOKEN" | python -c "import sys, json, re; print [ if i['id'] == '1': i['actions'] for i in json.load(sys.stdin)['servers']]"

但它返回语法错误

File "<string>", line 1
    import sys, json, re; for i in json.load(sys.stdin)['all']:\nif i['id'] == '1':\nprint(i['actions'])
                            ^
SyntaxError: invalid syntax

Answer 1

你想打印这个表达式:

[i['actions'] for i in json.load(sys.stdin)['all'] if i['id'] == '1']

这将过滤子字典/其中id == 1并使用actions数据构建列表.

所以适应卷曲命令行:

curl -s https://DOMAIN/API -H "X-Auth-Token: TOKEN" | python -c "import sys, json, re; print([i['actions'] for i in json.load(sys.stdin)['all'] if i['id'] == '1'])"

提供简单的python命令行:

[['power', 'reboot']]

id似乎是唯一的,所以也许最好避免返回1元素列表:

next((i['actions'] for i in json.load(sys.stdin)['all'] if i['id'] == '1'),None)

使用该表达式,它会产生['power', 'reboot']或者None如果没有找到