Fix hashable checker

Author: olegkkruglov

sklbench/report/implementation.py

@@ -16,7 +16,7 @@
 
 import argparse
 import json
-from typing import Dict, List
+from typing import Dict, Hashable, List
 
 import openpyxl as xl
 import pandas as pd
@@ -239,7 +239,7 @@ def get_result_tables_as_df(
     bench_cases = pd.DataFrame(
         [flatten_dict(bench_case) for bench_case in results["bench_cases"]]
     )
-    bench_cases = bench_cases.map(lambda x: str(x) if hasattr(x, "__hash__") else x)
+    bench_cases = bench_cases.map(lambda x: str(x) if not isinstance(x, Hashable) else x)
 
     if compatibility_mode:
         bench_cases = transform_results_to_compatible(bench_cases)