def encode_selected_predictions(predictions, selected_content_keys, accept):
"""Encode the selected predictions and keys based on the given accept type.
:param predictions: list of selected predictions (list of dict).
Output of serve_utils.get_selected_predictions(...)
See example below.
[{"predicted_label": 1, "probabilities": [0.4, 0.6]},
{"predicted_label": 0, "probabilities": [0.9, 0.1]}]
:param selected_content_keys: list of selected content keys (list of str)
:param accept: accept mime-type (str)
:return: encoded content in accept
"""
if accept == "application/json":
return json.dumps({"predictions": predictions})
if accept == "application/jsonlines":
return json_to_jsonlines({"predictions": predictions})
if accept == "application/x-recordio-protobuf":
return _encode_selected_predictions_recordio_protobuf(predictions)
if accept == "text/csv":
csv_response = _encode_selected_predictions_csv(
predictions, selected_content_keys)
if SAGEMAKER_BATCH:
return csv_response + '\n'
return csv_response
raise RuntimeError(
"Cannot encode selected predictions into accept type '{}'.".format(
accept))
def test_encoder_jsonlines_from_json():
json_response = json.dumps({'predictions': [{"predicted_label": 1, "probabilities": [0.4, 0.6]},
{"predicted_label": 0, "probabilities": [0.9, 0.1]}]})
expected_jsonlines = b'{"predicted_label": 1, "probabilities": [0.4, 0.6]}\n' \
b'{"predicted_label": 0, "probabilities": [0.9, 0.1]}\n'
jsonlines_response = encoder.json_to_jsonlines(json_response)
assert expected_jsonlines == jsonlines_response
def test_encoder_jsonlines_from_json_error():
bad_json_response = json.dumps({'predictions': [], 'metadata': []})
with pytest.raises(ValueError):
encoder.json_to_jsonlines(bad_json_response)