Error when trying to send post request via python /composite/sobjects

Question

Pretty much title says all, I was able to get the snippet within test = {} to work within salesforce workbench. Would love some guidance on what I am doing wrong as individual "non-bulk" requests work.

test = {
   "allOrNone" : "false",
   "records" : [{
       "attributes" : {"type" : "Sensor_Reading__e"},
       "id__c": "679",
       "power__c": "15.00",
       "temperature__c": "72.6",
       "captureTime__c": "2019-05-20"
    }]
}


headers = {
    'Content-Type': 'application/json',
    'Accept': 'application/json',
    'Authorization': 'Bearer '+str(response.json()['access_token'])
}
response = requests.post('https://na50.my.salesforce.com/services/data/v45.0/composite/sobjects', headers=headers,data=test)

print(response.text)

Error:

[{"message":"Unexpected character ('r' (code 114)): expected a valid value (number, String, array, object, 'true', 'false' or 'null') at [line:1, column:2]","errorCode":"JSON_PARSER_ERROR"}]

Answer 1

You need to convert the object via dumps. As near as I can tell:

import json

...

payload = json.dumps(test)
response = requests.post('https://na50.my.salesforce.com/services/data/v45.0/composite/sobjects', headers=headers,data=payload)

Check out the JSON library for more details.