Allow slicing of collections

[PProfizi]

Allow requesting entries in collections via Python slices, aka [start:stop:step].

[codecov]

❌ 74 Tests Failed:

Tests completed	Failed	Passed	Skipped
22817	74	22743	3154

View the top 3 failed test(s) by shortest run time

tests/test_collection.py::test_generic_data_containers_collection_slice[ansys-grpc-dpf]

Stack Traces | 0.003s run time

server_type = <ansys.dpf.core.server_types.LegacyGrpcServer object at 0x7f9f5c93ed40>

    def test_generic_data_containers_collection_slice(server_type):
>       coll = GenericDataContainersCollection(server=server_type)

tests/test_collection.py:251: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <ansys.dpf.core.GenericDataContainersCollection object at 0x7f9f50168520>
collection = None
server = <ansys.dpf.core.server_types.LegacyGrpcServer object at 0x7f9f5c93ed40>
entries_type = None

    def __init__(self, collection=None, server=None, entries_type: type = None):
        # step 1: get server
        self._server = server_module.get_or_create_server(
            collection._server if isinstance(collection, Collection) else server
        )
        if not self._server.meet_version("8.1"):
>           raise errors.DpfVersionNotSupported("8.1")
E           ansys.dpf.gate.errors.DpfVersionNotSupported: Feature not supported. Upgrade the server to 8.1 version (or above).

..../test-api/lib/python3.10.../dpf/core/collection.py:61: DpfVersionNotSupported

tests/test_collection.py::test_string_containers_collection_slice[ansys-grpc-dpf]

Stack Traces | 0.003s run time

server_type = <ansys.dpf.core.server_types.LegacyGrpcServer object at 0x7f22607a9fc0>

    def test_string_containers_collection_slice(server_type):
>       coll = StringFieldsCollection(server=server_type)

tests/test_collection.py:266: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <ansys.dpf.core.StringFieldsCollection object at 0x7f225a5ed4b0>
collection = None
server = <ansys.dpf.core.server_types.LegacyGrpcServer object at 0x7f22607a9fc0>
entries_type = None

    def __init__(self, collection=None, server=None, entries_type: type = None):
        # step 1: get server
        self._server = server_module.get_or_create_server(
            collection._server if isinstance(collection, Collection) else server
        )
        if not self._server.meet_version("8.1"):
>           raise errors.DpfVersionNotSupported("8.1")
E           ansys.dpf.gate.errors.DpfVersionNotSupported: Feature not supported. Upgrade the server to 8.1 version (or above).

..../test-api/lib/python3.10.../dpf/core/collection.py:61: DpfVersionNotSupported

tests\test_collection.py::test_collection::test_generic_data_containers_collection_slice[in Process CLayer]

Stack Traces | 0.003s run time

server_type = <ansys.dpf.core.server_types.InProcessServer object at 0x0000013C99BD3220>

    def test_generic_data_containers_collection_slice(server_type):
>       coll = GenericDataContainersCollection(server=server_type)

tests\test_collection.py:251: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <ansys.dpf.core.GenericDataContainersCollection object at 0x0000013C99BD0400>
collection = None
server = <ansys.dpf.core.server_types.InProcessServer object at 0x0000013C99BD3220>
entries_type = None

    def __init__(self, collection=None, server=None, entries_type: type = None):
        # step 1: get server
        self._server = server_module.get_or_create_server(
            collection._server if isinstance(collection, Collection) else server
        )
        if not self._server.meet_version("8.1"):
>           raise errors.DpfVersionNotSupported("8.1")
E           ansys.dpf.gate.errors.DpfVersionNotSupported: Feature not supported. Upgrade the server to 8.1 version (or above).

.tox\test-api\lib\site-packages\ansys\dpf\core\collection.py:61: DpfVersionNotSupported

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