missing iter_stats initialization

gleu.py

@@ -183,6 +183,7 @@ class gleu(evaluate.Metric):
                 {
                     "predictions": datasets.Value("string", id="sequence"),
                     "references": datasets.Value("string", id="sequence"),
+                    "order": datasets.Value("Int32"),
                 }
             ),
             codebase_urls=["https://github.com/cnap/gec-ranking/"],
@@ -193,7 +194,7 @@ class gleu(evaluate.Metric):
         # TODO: Download external resources if needed
         pass
 
-    def _compute(self, references, predictions):
+    def _compute(self, references, predictions, order=4):
         """Returns the scores"""
         
         num_iterations = 500
@@ -201,7 +202,7 @@ class gleu(evaluate.Metric):
         if len(references)==1:
             num_iterations = 1
             
-        gleu_calculator = GLEU(order=4)
+        gleu_calculator = GLEU(order=order)
         
         # if sources:
         #     gleu_calculator.load_sources(sources)
@@ -217,6 +218,8 @@ class gleu(evaluate.Metric):
             seed(j*101)
             indices.append([randint(0,len(references)-1) for i in range(len(predictions))])
         
+        iter_stats = [[0 for i in range(2*order+2)] for j in range(num_iterations) ]
+        
         for i,h in enumerate(predictions) :
             gleu_calculator.load_hypothesis_sentence(h)