refactor: Replace toolz.valmap in get_bindings_from_query_result

Replace toolz.valmap in get_bindings_from_query_result with dict
comprehension and remove unnecessary type cast.

Since toolz.valmap was the only use of toolz in the codebase, the
toolz dependency can be removed.

Closes: #55

pyproject.toml

@@ -8,7 +8,6 @@ readme = "README.md"
 [tool.poetry.dependencies]
 python = "^3.11"
 sparqlwrapper = "^2.0.0"
-toolz = "^0.12.1"
 pydantic = "^2.8.2"
 fastapi = {extras = ["standard"], version = "^0.112.0"}
 typeguard = "^4.3.0"

rdfproxy/utils/utils.py

@@ -1,13 +1,12 @@
 """SPARQL/FastAPI utils."""
 
-from collections.abc import Iterator, Mapping
-from typing import Any, cast
+from collections.abc import Iterator
+from typing import Any
 
 from SPARQLWrapper import QueryResult
 from pydantic import BaseModel
 from pydantic.fields import FieldInfo
 from rdfproxy.utils._types import SPARQLBinding, _TModelInstance
-from toolz import valmap
 
 
 def get_bindings_from_query_result(query_result: QueryResult) -> Iterator[dict]:
@@ -18,9 +17,9 @@ def get_bindings_from_query_result(query_result: QueryResult) -> Iterator[dict]:
             f"Received object with requestedFormat '{result_format}'."
         )
 
-    query_json = cast(Mapping, query_result.convert())
+    query_json: dict = query_result.convert()
     bindings = map(
-        lambda binding: valmap(lambda v: v["value"], binding),
+        lambda binding: {k: v["value"] for k, v in binding.items()},
         query_json["results"]["bindings"],
     )