从 json 字符串的自定义文本中获取日期

Question

我正在尝试遍历这个 json 字符串

"layoutOptions": {
    "titleText": "Route Number",
    "authorText": "West LA Yard",
    "copyrightText": "",
    "customTextElements": [{
            "Date": "9/11/2018, 7:37:35 AM"
        }
    ],
    "scaleBarOptions": {
        "metricUnit": "esriKilometers",
        "metricLabel": "km",
        "nonMetricUnit": "esriMiles",
        "nonMetricLabel": "mi"
    },
    "legendOptions": {
        "operationalLayers": [{
                "id": "ParcelRouteEditingTest_1458"
            }, {
                "id": "ParcelRouteEditingTest_1259"
            }
        ]
    }
}

我保留运行这个错误list indices must be integers, not str

layoutOpsDict = layoutData["layoutOptions"]
dateList = [dateEle["customTextElements"]["Date"] for dateEle in layoutOpsDict]

错误：追溯（最近一次通话最后一次）：

  File "<pyshell#44>", line 1, in <module>
    dateList = [dateEle["customTextElements"]["Date"] for dateEle in layoutOpsDict]
TypeError: string indices must be integers, not str

除了不断设置更多变量以跟踪之外，在 customTextElements 中获取日期的最佳方法是什么？

Answer 1

您正在遍历每个键，而不仅仅是 "customTextElements"，并且并非所有键都有以 "Date" 作为键的字典列表。

因为您只想查看映射到 "customTextElements" 的值，您只能循环遍历：

dateList = [dateEle["Date"] for dateEle in layoutOpsDict["customTextElements"]]

从 json 字符串的自定义文本中获取日期

Getting the date from customText from a json string

python

arcpy