[core][dataset] Check if indices is tuple instead of slice to avoid bug

darfix/core/dataset.py

@@ -26,7 +26,7 @@
 
 __authors__ = ["J. Garriga"]
 __license__ = "MIT"
-__date__ = "26/04/2021"
+__date__ = "26/05/2021"
 
 import copy
 import glob
@@ -1314,7 +1314,7 @@ class Data(numpy.ndarray):
             if len(data.shape) < 3:
                 data = data.view(numpy.ndarray)
             else:
-                if isinstance(indices[0], slice):
+                if isinstance(indices, tuple):
                     data.urls = self.urls[indices[0]]
                     data.metadata = self.metadata[indices[0]]
                 else: