将 Class 对象转换为 JSON Python - EasyPost - Django
Convert Class Object to JSON Python - EasyPost - Django
我正在通过 Python 2.7.9 在 Django 1.7 中构建一个 Json响应视图，用于跟踪通过 EasyPost API 发出的请求。观点：
def TrackingTable(request, trackingnumber):
easypost.api_key = 'xxxxxxxxxxxxxxxxxxx'
tracker = easypost.Tracker.create(
tracking_code='EZ3000000003',
carrier="UPS"
)
tracking = tracker['tracking_details']
return JsonResponse({"tracking":tracking, "url":request.get_full_path})
当这不起作用时，我试图查看问题是否与 Json 有关。所以我手动进入并尝试提取 JSON 值，因为 EasyPost API（和响应对象）显示 JSON 作为输出：
easypost.api_key = 'xxxxxxxxxxxxxxxxxxx'
tracker = easypost.Tracker.create(
tracking_code='EZ3000000003',
carrier="UPS"
)
>>> tracker
<Tracker Tracker at 0x7f467982be50> JSON: {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"carrier": "UPS",
"created_at": "2015-03-18T15:48:43Z",
"est_delivery_date": "2014-08-27T00:00:00Z",
"id": "trk_qufcxYmC",
"mode": "test",
"object": "Tracker",
"shipment_id": null,
"signed_by": null,
"status": "out_for_delivery",
"tracking_code": "EZ3000000003",
"tracking_details": [
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:24:00Z",
"message": "BILLING INFORMATION RECEIVED",
"object": "TrackingDetail",
"status": "pre_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": null,
"country": null,
"object": "TrackingLocation",
"state": null,
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:48:00Z",
"message": "ORIGIN SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SOUTH SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-22T08:51:00Z",
"message": "DEPARTURE SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SOUTH SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-23T09:31:00Z",
"message": "ARRIVAL SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-24T08:10:00Z",
"message": "OUT FOR DELIVERY",
"object": "TrackingDetail",
"status": "out_for_delivery",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
}
],
"updated_at": "2015-03-18T15:48:43Z",
"weight": 17.6
}>
"tracker" 是一个 class 对象
>>> print type(tracker)
<class 'easypost.Tracker'>
尝试将 class 转换为字典：
>>> this = dict(tracker)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/easypost/__init__.py", line 359, in keys
return self._values.keys()
AttributeError: 'set' object has no attribute 'keys'
尝试转储到 JSON:
>>> json.dumps(tracker)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/json/__init__.py", line 243, in dumps
return _default_encoder.encode(obj)
File "/usr/local/lib/python2.7/json/encoder.py", line 207, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/local/lib/python2.7/json/encoder.py", line 270, in iterencode
return _iterencode(o, 0)
File "/usr/local/lib/python2.7/json/encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <Tracker Tracker at 0x7f467982be50> JSON: {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"carrier": "UPS",
"created_at": "2015-03-18T15:48:43Z",
"est_delivery_date": "2014-08-27T00:00:00Z",
"id": "trk_qufcxYmC",
"mode": "test",
"object": "Tracker",
"shipment_id": null,
"signed_by": null,
"status": "out_for_delivery",
"tracking_code": "EZ3000000003",
"tracking_details": [
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:24:00Z",
"message": "BILLING INFORMATION RECEIVED",
"object": "TrackingDetail",
"status": "pre_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": null,
"country": null,
"object": "TrackingLocation",
"state": null,
"zip": null
}
},
# Removed same data as above to make shorter
"updated_at": "2015-03-18T15:48:43Z",
"weight": 17.6
} is not JSON serializable
>>>
看起来“tracking_details”中的嵌套 JSON 导致抛出错误，关于如何将数据转换为 JSON 对象的任何帮助？
我认为你需要一个序列化程序！
在 http://marshmallow.readthedocs.org 查看棉花糖！
我一直在使用它 JSON 序列化我的对象！
你需要这样写：
SomeObjectSerializer(Schema):
class Meta:
fields = ('api_key', 'id', 'someotherattributes')
然后当你想序列化你的对象时，只需调用：
obj = Model(**args)
SomeObjectSerializer(obj).data
这应该会给你一个 JSON 序列化输出
所以我能够通过 jsonpickle.
解决这个问题的最快方法是 beeb
来自 jsonpickle 的示例：
import jsonpickle
frozen = jsonpickle.encode(obj)
Use jsonpickle to recreate a Python object from a JSON string:
thawed = jsonpickle.decode(frozen)
Warning Loading a JSON string from an untrusted source represents a potential security vulnerability. jsonpickle makes no attempt to sanitize the input.
The new object has the same type and data, but essentially is now a copy of the original.
assert obj.name == thawed.name
If you will never need to load (regenerate the Python class from JSON), you can pass in the keyword unpicklable=False to prevent extra information from being added to JSON:
oneway = jsonpickle.encode(obj, unpicklable=False)
result = jsonpickle.decode(oneway)
assert obj.name == result['name'] == 'Awesome'
适用于这种情况：
>>>tracker_encode = jsonpickle.encode(tracker, unpicklable=False)
>>>tracker_decoded= jsonpickle.decode(tracker_encode)
>>> print type(tracker_decoded)
<type 'dict'>
>>> for x in tracker_decoded:
... print x
...
status
object
weight
tracking_details
shipment_id
created_at
_immutable_values
_transient_values
updated_at
_unsaved_values
tracking_code
carrier
mode
_values
est_delivery_date
_retrieve_params
api_key
id
signed_by
这将整个输出编码为字典，然后我可以使用 return JsonResponse({"tracking":tracking_decoded, "url":request.get_full_path})
将其转换为 json
使用Postman的结果：
从the source开始，您可以调用tracker.to_dict()
to_dict() 方法可用于客户端中的所有 EasyPost 对象。
Example:
tracker.to_dict().
我正在通过 Python 2.7.9 在 Django 1.7 中构建一个 Json响应视图，用于跟踪通过 EasyPost API 发出的请求。观点：
def TrackingTable(request, trackingnumber):
easypost.api_key = 'xxxxxxxxxxxxxxxxxxx'
tracker = easypost.Tracker.create(
tracking_code='EZ3000000003',
carrier="UPS"
)
tracking = tracker['tracking_details']
return JsonResponse({"tracking":tracking, "url":request.get_full_path})
当这不起作用时，我试图查看问题是否与 Json 有关。所以我手动进入并尝试提取 JSON 值，因为 EasyPost API（和响应对象）显示 JSON 作为输出：
easypost.api_key = 'xxxxxxxxxxxxxxxxxxx'
tracker = easypost.Tracker.create(
tracking_code='EZ3000000003',
carrier="UPS"
)
>>> tracker
<Tracker Tracker at 0x7f467982be50> JSON: {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"carrier": "UPS",
"created_at": "2015-03-18T15:48:43Z",
"est_delivery_date": "2014-08-27T00:00:00Z",
"id": "trk_qufcxYmC",
"mode": "test",
"object": "Tracker",
"shipment_id": null,
"signed_by": null,
"status": "out_for_delivery",
"tracking_code": "EZ3000000003",
"tracking_details": [
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:24:00Z",
"message": "BILLING INFORMATION RECEIVED",
"object": "TrackingDetail",
"status": "pre_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": null,
"country": null,
"object": "TrackingLocation",
"state": null,
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:48:00Z",
"message": "ORIGIN SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SOUTH SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-22T08:51:00Z",
"message": "DEPARTURE SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SOUTH SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-23T09:31:00Z",
"message": "ARRIVAL SCAN",
"object": "TrackingDetail",
"status": "in_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
},
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-24T08:10:00Z",
"message": "OUT FOR DELIVERY",
"object": "TrackingDetail",
"status": "out_for_delivery",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": "SAN FRANCISCO",
"country": "US",
"object": "TrackingLocation",
"state": "CA",
"zip": null
}
}
],
"updated_at": "2015-03-18T15:48:43Z",
"weight": 17.6
}>
"tracker" 是一个 class 对象
>>> print type(tracker)
<class 'easypost.Tracker'>
尝试将 class 转换为字典：
>>> this = dict(tracker)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/easypost/__init__.py", line 359, in keys
return self._values.keys()
AttributeError: 'set' object has no attribute 'keys'
尝试转储到 JSON:
>>> json.dumps(tracker)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/json/__init__.py", line 243, in dumps
return _default_encoder.encode(obj)
File "/usr/local/lib/python2.7/json/encoder.py", line 207, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/usr/local/lib/python2.7/json/encoder.py", line 270, in iterencode
return _iterencode(o, 0)
File "/usr/local/lib/python2.7/json/encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <Tracker Tracker at 0x7f467982be50> JSON: {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"carrier": "UPS",
"created_at": "2015-03-18T15:48:43Z",
"est_delivery_date": "2014-08-27T00:00:00Z",
"id": "trk_qufcxYmC",
"mode": "test",
"object": "Tracker",
"shipment_id": null,
"signed_by": null,
"status": "out_for_delivery",
"tracking_code": "EZ3000000003",
"tracking_details": [
{
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"datetime": "2014-08-21T14:24:00Z",
"message": "BILLING INFORMATION RECEIVED",
"object": "TrackingDetail",
"status": "pre_transit",
"tracking_location": {
"api_key": "IAiiSCSBtBXPKiaVmcc1wQ",
"city": null,
"country": null,
"object": "TrackingLocation",
"state": null,
"zip": null
}
},
# Removed same data as above to make shorter
"updated_at": "2015-03-18T15:48:43Z",
"weight": 17.6
} is not JSON serializable
>>>
看起来“tracking_details”中的嵌套 JSON 导致抛出错误，关于如何将数据转换为 JSON 对象的任何帮助？
我认为你需要一个序列化程序！
在 http://marshmallow.readthedocs.org 查看棉花糖！
我一直在使用它 JSON 序列化我的对象！
你需要这样写：
SomeObjectSerializer(Schema):
class Meta:
fields = ('api_key', 'id', 'someotherattributes')
然后当你想序列化你的对象时，只需调用：
obj = Model(**args)
SomeObjectSerializer(obj).data
这应该会给你一个 JSON 序列化输出
所以我能够通过 jsonpickle.
解决这个问题的最快方法是 beeb来自 jsonpickle 的示例：
import jsonpickle
frozen = jsonpickle.encode(obj)
Use jsonpickle to recreate a Python object from a JSON string:
thawed = jsonpickle.decode(frozen)
Warning Loading a JSON string from an untrusted source represents a potential security vulnerability. jsonpickle makes no attempt to sanitize the input.
The new object has the same type and data, but essentially is now a copy of the original.
assert obj.name == thawed.name
If you will never need to load (regenerate the Python class from JSON), you can pass in the keyword unpicklable=False to prevent extra information from being added to JSON:
oneway = jsonpickle.encode(obj, unpicklable=False)
result = jsonpickle.decode(oneway)
assert obj.name == result['name'] == 'Awesome'
适用于这种情况：
>>>tracker_encode = jsonpickle.encode(tracker, unpicklable=False)
>>>tracker_decoded= jsonpickle.decode(tracker_encode)
>>> print type(tracker_decoded)
<type 'dict'>
>>> for x in tracker_decoded:
... print x
...
status
object
weight
tracking_details
shipment_id
created_at
_immutable_values
_transient_values
updated_at
_unsaved_values
tracking_code
carrier
mode
_values
est_delivery_date
_retrieve_params
api_key
id
signed_by
这将整个输出编码为字典，然后我可以使用 return JsonResponse({"tracking":tracking_decoded, "url":request.get_full_path})
使用Postman的结果：
从the source开始，您可以调用tracker.to_dict()
to_dict() 方法可用于客户端中的所有 EasyPost 对象。
Example:
tracker.to_dict().