update_dataset_flowers (#33738)

python/paddle/dataset/flowers.py

@@ -114,35 +114,26 @@ def reader_creator(data_file,
     :return: data reader
     :rtype: callable
     '''
-    scio = try_import('scipy.io')
-
-    labels = scio.loadmat(label_file)['labels'][0]
-    indexes = scio.loadmat(setid_file)[dataset_name][0]
-
-    img2label = {}
-    for i in indexes:
-        img = "jpg/image_%05d.jpg" % i
-        img2label[img] = labels[i - 1]
-    file_list = batch_images_from_tar(data_file, dataset_name, img2label)
 
     def reader():
-        while True:
-            with open(file_list, 'r') as f_list:
-                for file in f_list:
-                    file = file.strip()
-                    batch = None
-                    with open(file, 'rb') as f:
-                        batch = pickle.load(f, encoding='bytes')
-
-                        if six.PY3:
-                            batch = cpt.to_text(batch)
-                        data_batch = batch['data']
-                        labels_batch = batch['label']
-                        for sample, label in six.moves.zip(data_batch,
-                                                           labels_batch):
-                            yield sample, int(label) - 1
-            if not cycle:
-                break
+        scio = try_import('scipy.io')
+
+        labels = scio.loadmat(label_file)['labels'][0]
+        indexes = scio.loadmat(setid_file)[dataset_name][0]
+
+        img2label = {}
+        for i in indexes:
+            img = "jpg/image_%05d.jpg" % i
+            img2label[img] = labels[i - 1]
+
+        tf = tarfile.open(data_file)
+        mems = tf.getmembers()
+        file_id = 0
+        for mem in mems:
+            if mem.name in img2label:
+                image = tf.extractfile(mem).read()
+                label = img2label[mem.name]
+                yield image, int(label) - 1
 
     if use_xmap:
         return xmap_readers(mapper, reader, min(4, cpu_count()), buffered_size)