我正在处理一个非常大的数据集,并且遇到了无法找到任何答案的问题。 我试图解析来自JSON数据,这里是我做过什么从整个数据集一块的数据和工作原理:如何解析python中的BIG JSON文件
import json
s = set()
with open("data.raw", "r") as f:
for line in f:
d = json.loads(line)
混乱的部分是,当我申请我的主数据代码(大小约200G)它显示了以下错误(不包括外出内存):
d = json.loads(line)
File "C:\Users\Sathyanarayanan\AppData\Local\Programs\Python\Python35-32\lib\json\__init__.py", line 319, in loads
return _default_decoder.decode(s)
File "C:\Users\Sathyanarayanan\AppData\Local\Programs\Python\Python35-32\lib\json\decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Users\Sathyanarayanan\AppData\Local\Programs\Python\Python35-32\lib\json\decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 2 column 1 (char 1)
类型(F)= TextIOWrapper是否有帮助......但这种数据类型也为小数据集。 ..
这里有几行我的数据看格式:
{"MessageType": "SALES.CONTRACTS.SALESTATUSCHANGED", "Event": {"Id": {"Source": 1, "SourceId": "ZGA=-3-1-002-0801743-2330650"}, "RefInfo": {"TenantId": {"Id": "ZGA="}, "UserId": {"Id": "ZMKj"}, "SentUtc": "2013-01-14T20:17:57.9681547", "Source": 1}, "OldStatus": {"Status": 3, "AutoRemoveInfo": null}, "NewStatus": {"Status": 4, "AutoRemoveInfo": null}, "Items": {"Items": [{"Id": {"Id": 1193}, "Sku": {"Sku": "Con BM20"}, "Quantity": 1, "UnitPrice": {"amount": 11.92, "currency": 840}}], "FulfilledItems": []}, "ShippingInfo": {"Carrier": "", "Class": "", "Region": null, "Country": 0, "PostalCode": null, "Costs": null, "Charges": null}, "SaleDate": "2013-01-13T13:39:57", "PendingItems": null, "Kits": null, "Products": null, "OldSaleDate": "0001-01-01T00:00:00", "AdditionalSaleInfo": null}}
{"MessageType": "SALES.CONTRACTS.SALESHIPPINGINFOCHANGED", "Event": {"Id": {"Source": 1, "SourceId": "ZGA=-3-1-002-0801743-2330650"}, "RefInfo": {"TenantId": {"Id": "ZGA="}, "UserId": {"Id": "ZMKj"}, "SentUtc": "2013-01-14T20:17:57.9681547", "Source": 1}, "Status": {"Status": 4, "AutoRemoveInfo": null}, "Items": {"Items": [{"Id": {"Id": 1193}, "Sku": {"Sku": "Con BM20"}, "Quantity": 1, "UnitPrice": {"amount": 11.92, "currency": 840}}], "FulfilledItems": []}, "OldShippingInfo": {"Carrier": "", "Class": "", "Region": null, "Country": 0, "PostalCode": null, "Costs": null, "Charges": null}, "NewShippingInfo": {"Carrier": "USPS", "Class": "FIRST/RECTPARCEL", "Region": null, "Country": 0, "PostalCode": null, "Costs": null, "Charges": null}, "SaleDate": "0001-01-01T00:00:00", "PendingItems": null, "Kits": null, "Products": null, "OldSaleDate": "0001-01-01T00:00:00", "AdditionalSaleInfo": null}}
{"MessageType": "SALES.CONTRACTS.SALECREATED", "Event": {"Id": {"Source": 1, "SourceId": "ZGA=-3-1-002-4851828-6514632"}, "RefInfo": {"TenantId": {"Id": "ZGA="}, "UserId": {"Id": "ZMKj"}, "SentUtc": "2013-01-14T20:17:58.1402505", "Source": 1}, "Status": {"Status": 4, "AutoRemoveInfo": null}, "Items": {"Items": [{"Id": {"Id": 9223372036854775807}, "Sku": {"Sku": "NFL Blanket Seahawks"}, "Quantity": 1, "UnitPrice": {"amount": 22.99, "currency": 840}}], "FulfilledItems": []}, "ShippingInfo": {"Carrier": "USPS", "Class": "FIRST/RECTPARCEL", "Region": null, "Country": 0, "PostalCode": null, "Costs": null, "Charges": null}, "SaleDate": "2013-01-13T15:51:12", "Kits": null, "Products": null, "AdditionalSaleInfo": null}}
{"MessageType": "SALES.CONTRACTS.SALECREATED", "Event": {"Id": {"Source": 1, "SourceId": "ZGA=-3-1-102-3824485-2270645"}, "RefInfo": {"TenantId": {"Id": "ZGA="}, "UserId": {"Id": "ZMKj"}, "SentUtc": "2013-01-14T20:17:58.3436109", "Source": 1}, "Status": {"Status": 4, "AutoRemoveInfo": null}, "Items": {"Items": [{"Id": {"Id": 9223372036854775807}, "Sku": {"Sku": "NFL CD Wallet Chargers"}, "Quantity": 1, "UnitPrice": {"amount": 12.99, "currency": 840}}], "FulfilledItems": []}, "ShippingInfo": {"Carrier": "USPS", "Class": "FIRST/RECTPARCEL", "Region": null, "Country": 0, "PostalCode": null, "Costs": null, "Charges": null}, "SaleDate": "2013-01-12T02:49:58", "Kits": null, "Products": null, "AdditionalSaleInfo": null}}
这是因为Json的我已经在第一解析2000行和它完美的作品。但是,当我尝试对大文件使用相同的过程时,它会显示数据的第一行中的错误。
应该对那个json数据做些什么改变? – RomanPerekhrest
'data.raw'是每个行上的json对象的json文件还是文件?如果前者使用['json.load'](https://docs.python.org/3.5/library/json.html#json.load) – Will
你的文件不是有效的JSON。不过,它似乎在每一行都包含有效的JSON文本。我的建议是,修正产生这个“JSON”的东西(它实际上不是JSON)。除此之外,我想你可以一行一行地将反序列化的对象堆积成一个列表或其他东西。 –