I'm getting this error message running the simple example from the "Datastream Web Service Getting Started with Python Guide". This was running fine a few days ago. Any suggestions, please?
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KeyError: 'DataResponse' when running ds.get_data(tickers='VOD', fields='P', kind=0)
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It may receive an invalid response from the server.
To verify the retrieved response, please run this code when the problem occurred.
import requests
post_msg = {
"DataRequest": {
"DataTypes": [
{
"Properties": None,
"Value": "P"
}
],
"Date": {
"End": "",
"Frequency": "",
"Kind": 0,
"Start": ""
},
"Instrument": {
"Properties": None,
"Value": "VOD"
},
"Tag": None
},
"Properties": {
"Key": "Source",
"Value": None
},
"TokenValue": ds.tokenResp['TokenValue']
}
res = requests.post("https://product.datastream.com/DSWSClient/V1/DSService.svc/rest/GetData", json=post_msg)
print(res.status_code)
print(res.headers)
print(res.text)
The output looks like:
200
{'Content-Type': 'application/json; charset=utf-8', 'Server': 'Microsoft-IIS/10.0', 'X-Powered-By': 'ASP.NET', 'Date': 'Tue, 16 Jun 2020 05:22:20 GMT', 'Content-Length': '266'}
{"DataResponse":{"AdditionalResponses":null,"DataTypeNames":null,"DataTypeValues":[{"DataType":"P","SymbolValues":[{"Currency":"£ ","Symbol":"VOD","Type":5,"Value":124.46}]}],"Dates":["\/Date(1592179200000+0000)\/"],"SymbolNames":null,"Tag":null},"Properties":null}
From the output, there is a "DataResponse" key in the response.
