Merge branch 'main' into simplify_evaluator

lm_eval/evaluator.py

@@ -465,10 +465,10 @@ def evaluate(
                     else bootstrap_iters,
                 )
 
-                if stderr is not None:
+                if stderr is not None and len(items) > 1:
                     results[task_name][metric + "_stderr" + "," + key] = stderr(items)
                 else:
-                    results[task_name][metric + "_stderr" + "," + key] = 0
+                    results[task_name][metric + "_stderr" + "," + key] = "N/A"
 
         if bool(results):
             for group, task_list in reversed(task_hierarchy.items()):

lm_eval/utils.py

@@ -371,7 +371,9 @@ def make_table(result_dict, column: str = "results"):
 
             if m + "_stderr" + "," + f in dic:
                 se = dic[m + "_stderr" + "," + f]
-                values.append([k, version, f, n, m, "%.4f" % v, "±", "%.4f" % se])
+                if se != "N/A":
+                    se = "%.4f" % se
+                values.append([k, version, f, n, m, "%.4f" % v, "±", se])
             else:
                 values.append([k, version, f, n, m, "%.4f" % v, "", ""])
             k = ""