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Tag v1.0.2 cannot create an extrinsic using the Utility.batch call using polkadot v.0.9.11

See original GitHub issue

The following code works when connecting to polkadot 0.9.10 but not 0.9.11

Fails when trying compose the batch call

from substrateinterface import SubstrateInterface, Keypair
from substrateinterface.exceptions import SubstrateRequestException

try:
    substrate = SubstrateInterface(
        url="ws://127.0.0.1:9944",
        type_registry_preset='development'
    )
except ConnectionRefusedError:
    print("⚠️ No local Substrate node running, try running 'start_local_substrate_node.sh' first")
    exit()

keypair = Keypair.create_from_uri('//Alice')

call_1 = {
    'call_module': 'Balances',
    'call_function': 'transfer',
    'call_args': {
        'dest':  '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty',
        'value': 1 * 10**15
    }
}

call_2 = {
    'call_module': 'Balances',
    'call_function': 'transfer',
    'call_args': {
        'dest':  '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty',
        'value': 1 * 10**15
    }
}

batch_call = substrate.compose_call(
    call_module='Utility',
    call_function='batch',
    call_params={
        'calls': [call_1, call_2]
    }
)

batched_extrinsic = substrate.create_signed_extrinsic(
    call=batch_call,
    keypair=keypair,
    era={'period': 64}
)


try:
    receipt = substrate.submit_extrinsic(batched_extrinsic, wait_for_inclusion=True)

    print('Extrinsic "{}" included in block "{}"'.format(
        receipt.extrinsic_hash, receipt.block_hash
    ))

    if receipt.is_success:

        print('✅ Success, triggered events:')
        for event in receipt.triggered_events:
            print(f'* {event.value}')

    else:
        print('⚠️ Extrinsic Failed: ', receipt.error_message)


except SubstrateRequestException as e:
    print("Failed to send: {}".format(e))

Stacktrace is :

Traceback (most recent call last):
  File "thing2.py", line 36, in <module>
    batch_call = substrate.compose_call(
  File "...pyenvs/core2/lib/python3.8/site-packages/substrateinterface/base.py", line 1422, in compose_call
    call.encode({
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/base.py", line 698, in encode
    self.data = self.process_encode(self.value_serialized)
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/types.py", line 1428, in process_encode
    data += arg_obj.encode(param_value)
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/base.py", line 698, in encode
    self.data = self.process_encode(self.value_serialized)
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/types.py", line 846, in process_encode
    data += element_obj.encode(element)
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/base.py", line 698, in encode
    self.data = self.process_encode(self.value_serialized)
  File "...pyenvs/core2/lib/python3.8/site-packages/scalecodec/types.py", line 1055, in process_encode
    raise ValueError("Value for enum with type_mapping can only have one value")
ValueError: Value for enum with type_mapping can only have one value