[Refine] Refine PR #122 (#123)

* update

* update

opencompass/openicl/icl_evaluator/icl_hf_evaluator.py

@@ -21,8 +21,7 @@ class HuggingfaceEvaluator(BaseEvaluator):
 
     def __init__(self, metric: str, seed: int = 0) -> None:
         self.metric = metric
-        random.seed(seed)
-        np.random.seed(seed)
+        self.seed = seed
         super().__init__()
 
     def _preprocess(self, predictions: List, references: List) -> dict:
@@ -61,6 +60,11 @@ class HuggingfaceEvaluator(BaseEvaluator):
         Returns:
             dict: calculated scores.
         """
+        random_state = random.getstate()
+        np_random_state = np.random.get_state()
+
+        random.seed(self.seed)
+        np.random.seed(self.seed)
         if len(predictions) != len(references):
             return {
                 'error':
@@ -70,7 +74,10 @@ class HuggingfaceEvaluator(BaseEvaluator):
             }
         metric = evaluate.load(self.metric)
         scores = metric.compute(**self._preprocess(predictions, references))
-        return self._postprocess(scores)
+        result = self._postprocess(scores)
+        random.setstate(random_state)
+        np.random.set_state(np_random_state)
+        return result
 
 
 @ICL_EVALUATORS.register_module()