refactor resize cell

Former-commit-id: 6e83b937ce

scripts/resize.py

@@ -25,8 +25,10 @@ class ODMResizeCell(ecto.Cell):
         photos = self.inputs.photos
         project_path = io.absolute_path_file(args['project_path'])
 
-        # loop over photos array
-        if photos:
+        if not photos:
+            log.ODM_ERROR('Not enough photos in photos to resize')
+            return ecto.QUIT
+        
         # create working directory
         resizing_dir = io.join_paths(project_path, 'images_resize')
         system.mkdir_p(resizing_dir)
@@ -70,9 +72,6 @@ class ODMResizeCell(ecto.Cell):
                     (photo.filename, img_r.shape, args['resize_to']))
             else:
                 log.ODM_WARNING('Already resized %s' % photo.filename)
-        else:
-            log.ODM_ERROR('Not enough photos in photos to resize')
-            return ecto.QUIT
 
         log.ODM_INFO('Resized %s images' % len(photos))