TypeError: __init__() missing 1 required positional argument: 'operation_name'

Getting this error (inconsistently) while invoking the step function with start_execution:

        client = session.client('stepfunctions', region_name=settings.AWS_REGION)
        response = client.start_execution(
            stateMachineArn=state_machine_arn,
            name=execution_id,
            input=input_string
        )

Here is part of the stack trace:

web_1      |     json.dumps(state_machine_input, cls=DecimalStringEncoder)
web_1      |   File "/usr/local/lib/python3.4/site-packages/timeout_decorator/timeout_decorator.py", line 91, in new_function
web_1      |     return timeout_wrapper(*args, **kwargs)
web_1      |   File "/usr/local/lib/python3.4/site-packages/timeout_decorator/timeout_decorator.py", line 150, in __call__
web_1      |     return self.value
web_1      |   File "/usr/local/lib/python3.4/site-packages/timeout_decorator/timeout_decorator.py", line 170, in value
web_1      |     flag, load = self.__queue.get()
web_1      |   File "/usr/local/lib/python3.4/multiprocessing/queues.py", line 116, in get
web_1      |     return ForkingPickler.loads(res)
web_1      | TypeError: __init__() missing 1 required positional argument: 'operation_name'

[blackbelt080]

interesting that you say that deciphering is difficult when boto3 is using SSL client side code rather than TLS code. It is setting up the input functions to work with different security types that is quite difficult. Sometimes a https can be setup to handle the boto.session imports with a simple call to the url and then initializing the constructor that calls the step function to iterate through the state machine arn, and input string. Might help you out or not 🔢

[jamestwebber]

My issues with these operations seem to be multiplying…is there any guide anywhere for how to efficiently copy (or restore, or anything) lots of files at once using boto3? Doing it per-file takes far too long. The multiprocessing approaches I’ve used in the past no longer seem to work for reasons that are not explained. And this repo is basically silent.