'CostExplorer' object has no attribute 'list_cost_allocation_tags'?

[daveshm]

output of

    client = boto3.client('ce')
    
    print(dir(client))

['_PY_TO_OP_NAME', 'class', 'delattr', 'dict', 'dir', 'doc', 'eq', 'format', 'ge', 'getattr', 'getattribute', 'gt', 'hash', 'init', 'init_subclass', 'le', 'lt', 'module', 'ne', 'new', 'reduce', 'reduce_ex', 'repr', 'setattr', 'sizeof', 'str', 'subclasshook', 'weakref', '_cache', '_client_config', '_convert_to_request_dict', '_emit_api_params', '_endpoint', '_exceptions', '_exceptions_factory', '_get_waiter_config', '_load_exceptions', '_loader', '_make_api_call', '_make_request', '_register_handlers', '_request_signer', '_response_parser', '_serializer', '_service_model', 'can_paginate', 'create_anomaly_monitor', 'create_anomaly_subscription', 'create_cost_category_definition', 'delete_anomaly_monitor', 'delete_anomaly_subscription', 'delete_cost_category_definition', 'describe_cost_category_definition', 'exceptions', 'generate_presigned_url', 'get_anomalies', 'get_anomaly_monitors', 'get_anomaly_subscriptions', 'get_cost_and_usage', 'get_cost_and_usage_with_resources', 'get_cost_categories', 'get_cost_forecast', 'get_dimension_values', 'get_paginator', 'get_reservation_coverage', 'get_reservation_purchase_recommendation', 'get_reservation_utilization', 'get_rightsizing_recommendation', 'get_savings_plans_coverage', 'get_savings_plans_purchase_recommendation', 'get_savings_plans_utilization', 'get_savings_plans_utilization_details', 'get_tags', 'get_usage_forecast', 'get_waiter', 'list_cost_category_definitions', 'meta', 'provide_anomaly_feedback', 'update_anomaly_monitor', 'update_anomaly_subscription', 'update_cost_category_definition', 'waiter_names']

however the doc says the method exists https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ce.html#CostExplorer.Client.list_cost_allocation_tags

[daveshm]

had to upgrade boto version with layer :/ https://aws.amazon.com/premiumsupport/knowledge-center/lambda-python-runtime-errors/