When no files match the partition in AzureMLWorkEnvironment, an exception occurs

[SamVanhoutte]

Describe the bug
When calling this code (without a file matching), an exception happens

work_env = WorkEnvironment.Create(connected=True, datastore_path='arcus_partition_test')
partition_df = work_env.load_tabular_partition(partition_name= 'test-partitioning/BLALBA*', columns=['Close', 'High', 'Isin', 'ItemDate', 'Low', 'Market', 'Open', 'Ticker', 'Volume'])

To Reproduce
Execute the code above with a non matching partition_name

Expected behavior
This should return None, instead of failing with an exception

Additional context
Question open on stackoverflow.

[SamVanhoutte]

This is currently handled in the following approach, but should hopefully be more gracefully handled:

        try:
            _header = PromoteHeadersBehavior.ALL_FILES_HAVE_SAME_HEADERS if first_row_header else False
            _aml_dataset = Dataset.Tabular.from_delimited_files(header=_header,
                path=DataPath(datastore, '/' + partition_name + '.csv')) #, set_column_types=columns
            _df = _aml_dataset.to_pandas_dataframe()
        except DatasetValidationError as dsvalex:
            if 'provided path is not valid' in str(dsvalex):
                return None
            else:
                raise

[SamVanhoutte]

according to stackoverflow question, it's the only possibility by catching the exception