add copy paste

ppocr/data/simple_dataset.py

@@ -69,6 +69,36 @@ class SimpleDataSet(Dataset):
         random.shuffle(self.data_lines)
         return
 
+    def get_ext_data(self):
+        ext_data_num = 0
+        for op in self.ops:
+            if hasattr(op, 'ext_data_num'):
+                ext_data_num = getattr(op, 'ext_data_num')
+                break
+        load_data_ops = self.ops[:2]
+        ext_data = []
+
+        while len(ext_data) < ext_data_num:
+            file_idx = self.data_idx_order_list[np.random.randint(self.__len__(
+            ))]
+            data_line = self.data_lines[file_idx]
+            data_line = data_line.decode('utf-8')
+            substr = data_line.strip("\n").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):
+                continue
+            with open(data['img_path'], 'rb') as f:
+                img = f.read()
+                data['image'] = img
+            data = transform(data, load_data_ops)
+            if data is None:
+                continue
+            ext_data.append(data)
+        return ext_data
+
     def __getitem__(self, idx):
         file_idx = self.data_idx_order_list[idx]
         data_line = self.data_lines[file_idx]
@@ -84,6 +114,7 @@ class SimpleDataSet(Dataset):
             with open(data['img_path'], 'rb') as f:
                 img = f.read()
                 data['image'] = img
+            data['ext_data'] = self.get_ext_data()
             outs = transform(data, self.ops)
         except Exception as e:
             self.logger.error(