Polish

Inst_eddies/Analysis/anim_eddy_contours.py

@@ -13,6 +13,8 @@ def bbox_union(b1, b2):
                 max(b1[3], b2[3])]
 
 def compute_bbox(ishape_lists, reader_outer):
+    """ishape_lists should be a dictionary."""
+
     bbox = None
 
     for ishape_list in ishape_lists.values():