Merge pull request #186 from binary-signal/main

Fix for benchmark name when supplied by the user

quantstats/reports.py

@@ -73,7 +73,18 @@ def html(returns, benchmark=None, rf=0., grayscale=False,
     # prepare timeseries
     returns = _utils._prepare_returns(returns)
     if benchmark is not None:
-        tpl = tpl.replace('{{benchmark_title}}', f"Benchmark is {benchmark} | ")
+
+         def get_benchmark_title(bench):
+            if isinstance(bench, str):
+                return bench
+            elif isinstance(bench, _pd.Series):
+                return bench.name
+            elif isinstance(bench, _pd.DataFrame):
+                return bench[bench.columns[0]].name
+            else:
+                raise ValueError("Can't infer benchmark title")
+
+        tpl = tpl.replace('{{benchmark_title}}', f"Benchmark is {get_benchmark_title(benchmark)} | ")
         benchmark = _utils._prepare_benchmark(benchmark, returns.index, rf)
         if match_dates is True:
             returns, benchmark = _match_dates(returns, benchmark)