Unable to create CfnSpotFleet using Python

When running CDK synth I am getting JSII error jsii.errors.JSIIError: Value did not match any type in union: Value did not match any type in union: Expected array type, got {"$jsii.struct":{"fqn":"@aws-cdk/aws-ec2.CfnSpotFleet.SpotFleetLaunchSpecificationProperty",

Reproduction Steps

I created a spot fleet stack and when I am defining CfnSpotFleet I am seeing the JSIIError

 batch_workers_request_config_data = ec2.CfnSpotFleet.SpotFleetRequestConfigDataProperty(
            iam_fleet_role=spotfleet_role.role_arn,
            target_capacity=num_of_workers,
            instance_interruption_behavior='terminate',
            launch_specifications=batch_workers_launch_specification
        )
        ec2.CfnSpotFleetProps(spot_fleet_request_config_data=batch_workers_request_config_data)

        ec2.CfnSpotFleet(self, id=f'{id}-spot-fleet',
                         spot_fleet_request_config_data=batch_workers_request_config_data)

Error Log

Environment

• **CLI Version :
• **Framework Version (CDK): 1.30.0 (build 4f54ff7)
• **OS : MacOS 10.14.6
• **Language : English

Other

I am looking through the python library and see that CfnSpotFleet doesn’t have the JSII annotations that CfnSpotFleetProps has. I am not exactly that it cause this issue though.

@jsii.data_type(jsii_type="@aws-cdk/aws-ec2.CfnSpotFleetProps", jsii_struct_bases=[], name_mapping={'spot_fleet_request_config_data': 'spotFleetRequestConfigData'})
class CfnSpotFleetProps():

@jsii.implements(aws_cdk.core.IInspectable)
class CfnSpotFleet(aws_cdk.core.CfnResource, metaclass=jsii.JSIIMeta, jsii_type="@aws-cdk/aws-ec2.CfnSpotFleet"):

Is a side note. Where is the python library source code hosted or it is being generated?

Please let me know if any other information is required.

Thank you!

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This is 🐛 Bug Report

[jinamshah]

@yanz67 spot_fleet_request_config_data=[batch_workers_request_config_data]) This is wrong and this is not pluralised but this is launch_specifications=[batch_workers_launch_specification] I know you might have solved this issue by now, but this is for anyone else facing the issue.

[jinamshah]

@yanz67 do you have any idea about attaching tags to Spot Fleet request? They recently announced this feature but I haven’t been able to find a solution using cdk