Question

我有一个脚本，我希望与NumPy一起使用，在地理数据库中创建一个要素类。有几件事情正在发生，当我发送请求时，我发送给服务器的相关json数据与我的响应不同，因此我无法确定我的键值是什么，如果有的话。我最终希望有一个键值并循环遍历嵌套项目，以用作要素类中的字段。

代码：

import requests
import json
import jsonpickle
import arcpy
import json
import numpy
import requests


fc = "C:\MYLATesting.gdb\MYLA311"
if arcpy.Exists(fc):
  arcpy.Delete_management(fc)

f = open('C:\Users\Administrator\Desktop\myla311.json', 'r')

data = jsonpickle.encode( jsonpickle.decode(f.read()) )

url = "myURL.com"
headers = {'Content-type': 'text/plain', 'Accept': '/'}

r = requests.post(url)

parsed_json = r.json()

sr = arcpy.SpatialReference(4326)

response = requests.post(url, data=data, headers=headers)
f.close()

ndtype = numpy.dtype([
    ('Comment', 'S48')
])

vehicles = []
for item in parsed_json["La311ServiceRequestNotes"]:
    vehicles.append(tuple(item[k] for k in ndtype.names))

narr = numpy.array(vehicles,  ndtype)
arcpy.da.NumPyArrayToFeatureClass(narr, fc, [34.1728677, -118.5389413], sr)


print response.text

发送到服务器的JSON：

   {
        "MetaData": {},
        "RequestSpecificDetail": {
            "ParentSRNumberForLink": ""
        },
        "SRData": {
            "Anonymous": "Y",
            "Assignee": "",
            "CreatedByUserLogin": "",
            "CustomerAccessNumber": "",
            "LADWPAccountNo": "",
            "Language": "English",
            "ListOfLa311GisLayer": {},
            "ListOfLa311ServiceRequestNotes": {
                "La311ServiceRequestNotes": [
                    {
                        "Comment": "hxhdudi",
                        "CommentType": "Feedback",
                        "FeedbackSRType": "Weed Abatement for Pvt Parcels",
                        "IsSrNoAvailable": "N"
                    },
                    {
                        "Comment": "",
                        "CommentType": "External",
                        "CreatedByUser": "",
                        "IsSrNoAvailable": "N"
                    }
                ]
            },
            "LoginUser": "",
            "MobilOS": "Android",
            "NewContactEmail": "",
            "NewContactFirstName": "",
            "NewContactLastName": "",
            "NewContactPhone": "",
            "Owner": "Other",
            "ParentSRNumber": "",
            "Priority": "Normal",
            "SRCommunityPoliceStation": "RAMPART",
            "SRType": "Feedback",
            "ServiceDate": "01/22/2015",
            "Source": "Mobile App",
            "Status": "Open",
            "UpdatedByUserLogin": ""
        }
    }

错误：

 line 37, in <module>
    for item in parsed_json["La311ServiceRequestNotes"]:
KeyError: 'La311ServiceRequestNotes'

仅使用请求模块和JSON作为提交POST请求的数据的成功请求输出示例：

{"status":{"code":311,"message":"Service Request Successfully Submited","cause":""},"Response":{"PrimaryRowId":"1-3J1UX","ListOfServiceRequest":{"ServiceRequest":[{"SRNumber":"1-5927721"}]}}}

出于测试目的，我至少希望将输出SRNumber写入我的要素类。

Answer 1

首先，您不需要选择SRData词典吗？

parsed_json["SRData"]["La311ServiceRequestNotes"]

究竟是什么parsed_json？因为它给你一个KeyError，它是一个字典。它的关键是什么？

JSON键值在Python中返回错误

1 个答案: