Update testdata.py

testdata.py

@@ -113,7 +113,7 @@ class TestData(datasets.GeneratorBasedBuilder):
             gt_path = os.path.join(annotation_dir, gt_relative_path)
             
             annotation = defaultdict(list)
-            with open(gt_file, "r", encoding="utf-8") as f:
+            with open(gt_path, "r", encoding="utf-8") as f:
                 line = f.readline().strip()
                 while line:
                     assert re.match(r"^\d( [\d\.]+){4,5}$", line), "Incorrect line: %s" % line