怎么用python提取{"SIPSUB":{"info":{"courseRole":28,"courseType":1,"detail":"","id":"R28","memberLen":4,"members":[{"infoAccount":"420","infoAlias":"420主讲","infoIp":"","stAudio":true,"stCamera":true,"stMic":false,"stRole":1,"stStatus":3,"stVideo":true},{"infoAccount":"421","infoAlias":"421听讲","infoIp":"","stAudio":false,"stCamera":true,"stMic":false,"stRole":2,"stStatus":3,"stVideo":true},{"infoAccount":"422","infoAlias":"422听讲","infoIp":"","stAudio":false,"stCamera":true,"stMic":false,"stRole":2,"stStatus":0,"stVideo":false},{"infoAccount":"423","infoAlias":"423听讲","infoIp":"","stAudio":false,"stCamera":true,"stMic":false,"stRole":2,"stStatus":0,"stVideo":false}],"speaker":"","timeEnd":"","timeStart":"","title":"420课堂互动4人"}} 中第二个开始的infoAccount 并设为全局变量

要提取给定字典中从第二个成员开始的所有 "infoAccount 值，并将其设为全局变量，你可以按以下步骤进行：

data = {
    "SIPSUB": {
        "info": {
            "courseRole": 28,
            "courseType": 1,
            "detail": "",
            "id": "R28",
            "memberLen": 4,
            "members": [
                {
                    "infoAccount": "420",
                    "infoAlias": "420主讲",
                    "infoIp": "",
                    "stAudio": True,
                    "stCamera": True,
                    "stMic": False,
                    "stRole": 1,
                    "stStatus": 3,
                    "stVideo": True
                },
                {
                    "infoAccount": "421",
                    "infoAlias": "421听讲",
                    "infoIp": "",
                    "stAudio": False,
                    "stCamera": True,
                    "stMic": False,
                    "stRole": 2,
                    "stStatus": 3,
                    "stVideo": True
                },
                {
                    "infoAccount": "422",
                    "infoAlias": "422听讲",
                    "infoIp": "",
                    "stAudio": False,
                    "stCamera": True,
                    "stMic": False,
                    "stRole": 2,
                    "stStatus": 0,
                    "stVideo": False
                },
                {
                    "infoAccount": "423",
                    "infoAlias": "423听讲",
                    "infoIp": "",
                    "stAudio": False,
                    "stCamera": True,
                    "stMic": False,
                    "stRole": 2,
                    "stStatus": 0,
                    "stVideo": False
                }
            ],
            "speaker": "",
            "timeEnd": "",
            "timeStart": "",
            "title": "420课堂互动4人"
        }
    }
}

global info_accounts
info_accounts = [member["infoAccount"] for member in data["SIPSUB"]["info"]["members"][1:]]
print(info_accounts)

在这段代码中，我们使用列表切片 `[1:]` 来从第二个成员开始提取 "infoAccount" 值。然后，我们将提取的值存储在名为 `info_accounts` 的全局变量中。最后，我们打印 `info_accounts` 列表以验证提取的值。

请注意，在代码中使用 `global` 关键字声明 `info_accounts` 为全局变量，以便在其他函数或作用域中访问它。

运行以上代码，输出将是：

['421', '422', '423']

这些就是从第二个成员开始提取的 "infoAccount" 值，并存储在全局变量 `info_accounts` 中。