add file_patb check to dataset

ppocr/data/simple_dataset.py

@@ -46,6 +46,7 @@ class SimpleDataSet(Dataset):
         self.seed = seed
         logger.info("Initialize indexs of datasets:%s" % label_file_list)
         self.data_lines = self.get_image_info_list(label_file_list, ratio_list)
+        self.check_data()
         self.data_idx_order_list = list(range(len(self.data_lines)))
         if self.mode == "train" and self.do_shuffle:
             self.shuffle_data_random()
@@ -102,16 +103,8 @@ class SimpleDataSet(Dataset):
 
     def __getitem__(self, idx):
         file_idx = self.data_idx_order_list[idx]
-        data_line = self.data_lines[file_idx]
+        data = self.data_lines[file_idx]
         try:
-            data_line = data_line.decode('utf-8')
-            substr = data_line.strip("\n").strip("\r").split(self.delimiter)
-            file_name = substr[0]
-            label = substr[1]
-            img_path = os.path.join(self.data_dir, file_name)
-            data = {'img_path': img_path, 'label': label}
-            if not os.path.exists(img_path):
-                raise Exception("{} does not exist!".format(img_path))
             with open(data['img_path'], 'rb') as f:
                 img = f.read()
                 data['image'] = img
@@ -120,8 +113,8 @@ class SimpleDataSet(Dataset):
         except:
             error_meg = traceback.format_exc()
             self.logger.error(
-                "When parsing line {}, error happened with msg: {}".format(
-                    data_line, error_meg))
+                "When parsing file {} and label {}, error happened with msg: {}".format(
+                    data['img_path'],data['label'], error_meg))
             outs = None
         if outs is None:
             # during evaluation, we should fix the idx to get same results for many times of evaluation.
@@ -132,3 +125,17 @@ class SimpleDataSet(Dataset):
 
     def __len__(self):
         return len(self.data_idx_order_list)
+
+    def check_data(self):
+        new_data_lines = []
+        for data_line in self.data_lines:
+            data_line = data_line.decode('utf-8')
+            substr = data_line.strip("\n").strip("\r").split(self.delimiter)
+            file_name = substr[0]
+            label = substr[1]
+            img_path = os.path.join(self.data_dir, file_name)
+            if os.path.exists(img_path):
+                new_data_lines.append({'img_path': img_path, 'label': label})
+            else:
+                self.logger.info("{} does not exist!".format(img_path))
+        self.data_lines = new_data_lines
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