When using put_intent to update an existing intent, I provide the checksum in this way:
checksum = lex_client.get_intent(name=intent_name, version='$LATEST')['checksum']
and then use the checksum with put_intent:
lex_client.put_intent(
name=name,
slots=slots,
sampleUtterances=utterances,
checksum=checksum
)
The exception thrown is:
botocore.errorfactory.BadRequestException: An error occurred (BadRequestException) when calling the PutIntent operation: The fulfillment is not valid for intent 'TotalWasteForItem'. Specify another fullfillment.
Intent does not have multiple versions, '$LATEST' is the only one. Checksum is returned normally and is of type str.
put_intent requires the fulfillmentActivity be passed:
fulfillmentActivity (dict) -- Describes how the intent is fulfilled. For example, after a user provides all of the information for a pizza order, fulfillmentActivity defines how the bot places an order with a local pizza store.
You might configure Amazon Lex to return all of the intent information to the client application, or direct it to invoke a Lambda function that can process the intent (for example, place an order with a pizzeria).
type (string) -- [REQUIRED] How the intent should be fulfilled, either by running a Lambda function or by returning the slot data to the client application.
...
You can provide this to simply response with the parameters. This is good for testing.
fulfillmentActivity={'type': 'ReturnIntent'},