Add future annotations to I/O modules

Author: PierreRaybaut

cdl/core/io/__init__.py

@@ -7,6 +7,8 @@
 DataLab I/O module
 """
 
+from __future__ import annotations
+
 # Registering dynamic I/O features:
 import cdl.core.io.h5  # pylint: disable=unused-import
 import cdl.core.io.image  # pylint: disable=unused-import

cdl/core/io/image/formats.py

@@ -7,6 +7,8 @@
 DataLab I/O image formats
 """
 
+from __future__ import annotations
+
 import os.path as osp
 
 import numpy as np

cdl/core/io/signal/formats.py

@@ -7,6 +7,8 @@
 DataLab I/O signal formats
 """
 
+from __future__ import annotations
+
 import numpy as np
 
 from cdl.config import _