Fix passing graph as identifier

Author: mielvds

lib/pyld/canon.py

@@ -4,6 +4,7 @@
 import rdflib
 from rdflib import XSD, BNode, Dataset, Literal, Node
 from rdflib.graph import DATASET_DEFAULT_GRAPH_ID
+from rdflib.parser import StringInputSource
 from rdflib.plugins.parsers.nquads import NQuadsParser
 from rdflib.plugins.serializers.nt import _quote_encode
 
@@ -44,7 +45,7 @@ def main(self, dataset: str | dict | Dataset, options) -> str | dict:
             ):
                 raise UnknownFormatError('Unknown input format.', options['format'])
             rdflib.NORMALIZE_LITERALS = False
-            parser.parse(rdflib.parser.StringInputSource(dataset), rdflib_dataset)
+            parser.parse(StringInputSource(dataset), rdflib_dataset)
         elif isinstance(dataset, dict):
             rdflib_dataset = from_legacy_dataset(dataset)
         elif isinstance(dataset, Dataset):

lib/pyld/util.py

@@ -61,7 +61,7 @@ def from_legacy_dataset(dataset: dict) -> Dataset:
     for graph_name, triples in dataset.items():
         # Handle graph name
         try:
-            g = from_legacy_graph(graph_name, ds.default_graph)
+            g = from_legacy_graph(graph_name, ds.default_graph.identifier)
         except Exception as err:
             raise ValueError(f'Illegal graph name: {graph_name}') from err