add helper module template for testing purposes.

cer.py

@@ -0,0 +1,2 @@
+def calculate_cer(*args):
+    return -1

iliauniiccocrevaluation.py

@@ -18,6 +18,8 @@ import datasets
 
 
 # TODO: Add BibTeX citation
+from cer import calculate_cer
+
 _CITATION = """\
 @InProceedings{huggingface:module,
 title = {A great new module},
@@ -89,7 +91,8 @@ class IliauniIccOCREvaluation(evaluate.Metric):
     def _compute(self, predictions, references):
         """Returns the scores"""
         # TODO: Compute the different scores of the module
-        accuracy = sum(i == j for i, j in zip(predictions, references)) / len(predictions)
+        cer = calculate_cer(predictions, references)
+
         return {
-            "accuracy": accuracy,
+            "CER": cer,
         }