Reverted changes in data_folder related to h5py import

bob/learn/pytorch/datasets/data_folder.py

@@ -22,7 +22,7 @@ from torchvision import transforms
 
 import torch
 
-# import h5py
+import h5py
 
 
 #==============================================================================
@@ -55,8 +55,6 @@ def get_file_names_and_labels(files, data_folder, extension = ".hdf5", hldi_type
         frame to extract the data from.
     """
 
-    import h5py
-
     file_names_labels_keys = []
 
     if hldi_type == "pad":
@@ -202,8 +200,6 @@ class DataFolder(data.Dataset):
             Index of the class.
         """
 
-        import h5py
-
         path, target, key = self.file_names_labels_keys[index]
 
         with h5py.File(path, "r") as f_h5py: