As I have finally figured out the format of the data and how to decode it I offer the following:
restjson=json.loads(httpresponse)
rawblob=restjson[0]['blobJson']
blobjson=rawblob.replace('\'','"')
sensordata=json.loads(blobjson)
print('List the first two entries of sensordata:')
for x in sensordata[:2]:
print('\t', x)
print('\nList the individual items of the first entry:')
for k,v in sensordata[0].items():
print('\t', k, ":", v)
From that you should be able to figure out what to do next.