Python无法更新JSON字符串的坐标
我从一个sql表中获取JSON数据并对其进行解析,以便从中获得很少的组件,但对于特定的列,我无法做到这一点。Python无法更新JSON字符串的坐标,python,json,for-loop,pyodbc,reverse-geocoding,Python,Json,For Loop,Pyodbc,Reverse Geocoding,我从一个sql表中获取JSON数据并对其进行解析,以便从中获得很少的组件,但对于特定的列,我无法做到这一点。lat和lng保持为空,否则所有内容都会更新 下面是片段 ID=[] json_string=[] for row in cursor.fetchall(): ID.append(row[0]) json_string.append(row[1]) #print('fetched') address_fields = {
lat
和lng
保持为空,否则所有内容都会更新
下面是片段
ID=[]
json_string=[]
for row in cursor.fetchall():
ID.append(row[0])
json_string.append(row[1])
#print('fetched')
address_fields = {
'intersection': [],
'political': [],
'country': []
}
dumpData = json.dumps(json_string)
json_all = json.loads(dumpData)
id_index = 0
for json_str in json_all:
address_fields = {
'intersection': [],
'political': [],
'country': [],
}
try:
json_results = json.loads(json_str)
print(id_index,' Updation starts')
if isinstance(json_results,dict):
first_address_components = json_results['results'][0]['address_components']
else:
first_address_components = json_results[0]['address_components']
for item in first_address_components:
for field_key in address_fields.keys():
if field_key in item['types']:
address_fields[field_key].append(item['long_name'])
address_fields[field_key].append(item['results'][0]['geometry']['location']['lat'])
address_fields[field_key].append(item['results'][0]['geometry']['location']['lng'])
# convert lists to single strings
address_fields = {key: ', '.join(values) for key, values in address_fields.items()}
sql = "UPDATE GEOCODE_TBL SET PXVAL=?,PYVAL=?, intersection=?, political=?, country=? WHERE GEOCODE_ID=?"
params = (
address_fields['intersection'],
address_fields['political'],
address_fields['country'])
)
print(id_index,'updation done')
cursor.execute(sql, params)
id_index = id_index + 1
except Exception as e:
print('Expection ' ,id_index)
id_index = id_index + 1
pass
每一列都会根据lat和lng
任何关于我哪里出错的建议
谢谢
下面是示例JSON字符串
{
"results":[
{
"address_components":[
{
"long_name":"Nanabhai Moos Marg",
"short_name":"Nanabhai Moos Marg",
"types":[
"route"
]
},
{
"long_name":"Navy Nagar",
"short_name":"Navy Nagar",
"types":[
"political",
"sublocality",
"sublocality_level_2"
]
},
{
"long_name":"Colaba",
"short_name":"Colaba",
"types":[
"political",
"sublocality",
"sublocality_level_1"
]
},
{
"long_name":"Mumbai",
"short_name":"Mumbai",
"types":[
"locality",
"political"
]
},
{
"long_name":"Mumbai",
"short_name":"Mumbai",
"types":[
"administrative_area_level_2",
"political"
]
},
{
"long_name":"Maharashtra",
"short_name":"MH",
"types":[
"administrative_area_level_1",
"political"
]
},
{
"long_name":"India",
"short_name":"IN",
"types":[
"country",
"political"
]
},
{
"long_name":"400005",
"short_name":"400005",
"types":[
"postal_code"
]
}
],
"formatted_address":"Nanabhai Moos Marg, Navy Nagar, Colaba, Mumbai, Maharashtra 400005, India",
"geometry":{
"bounds":{
"northeast":{
"lat":18.8947505,
"lng":72.80972229999999
},
"southwest":{
"lat":18.894101,
"lng":72.8084149
}
},
"location":{
"lat":18.8943079,
"lng":72.8090094
},
"location_type":"GEOMETRIC_CENTER",
"viewport":{
"northeast":{
"lat":18.8957747302915,
"lng":72.8104175802915
},
"southwest":{
"lat":18.8930767697085,
"lng":72.8077196197085
}
}
},
"place_id":"ChIJjdazXn_R5zsR__eePPSFcIs",
"types":[
"route"
]
},
{
"address_components":[
{
"long_name":"India",
"short_name":"IN",
"types":[
"country",
"political"
]
}
],
"formatted_address":"India",
"geometry":{
"bounds":{
"northeast":{
"lat":35.5087008,
"lng":97.39535869999999
},
"southwest":{
"lat":6.4626999,
"lng":68.1097
}
},
"location":{
"lat":20.593684,
"lng":78.96288
},
"location_type":"APPROXIMATE",
"viewport":{
"northeast":{
"lat":35.5087008,
"lng":97.39535869999999
},
"southwest":{
"lat":6.4626999,
"lng":68.1097
}
}
},
"place_id":"ChIJkbeSa_BfYzARphNChaFPjNc",
"types":[
"country",
"political"
]
}
],
"status":"OK"
}
您的错误是试图从子对象访问JSON的父键 在
item['results'][0]['geometry']['location']['lat']
行中,item
是results
列表中的一个对象,但您将其视为根JSON字典
使用json_results['results'][0]…
应该可以解决这个问题
注意:通常正确格式化JSON会暴露代码中的错误,在编写解析器时总是使用格式化文档,以使其变得简单。否,我将其更改为
地址字段[field\u key]。追加(JSON\u结果['results'][0]['geometry']['location']['lng'])
仍然没有更新捕获异常消息时,您是否查看了异常消息?如果您使用的是Atom或VS代码,则可以进行调试,否则请先打印e.message以了解问题发生的位置。我使用的是spyder editor,它不会给出任何异常消息,执行时没有任何警告或错误消息Yes,这就是为什么要在块中添加我上面提到的print
行,例外情况除外,即e:
块。这就是异常的意义所在,它们可以帮助您进行调试。此外,它不会引发任何错误并停止执行的原因是,您已使用try。。。除了
!添加了,但例外情况为e:print(e.message)
,但仍然没有更改