--- a/src/pyams_utils/list.py	Tue Nov 15 10:43:55 2016 +0100
+++ b/src/pyams_utils/list.py	Fri Nov 18 15:28:54 2016 +0100
@@ -23,7 +23,11 @@
 def unique(seq, idfun=None):
     """Extract unique values from list, preserving order
 
-    Original list is not modified.
+    :param list seq: input list
+    :param callable idfun: an identity function which is used to get 'identity' value of each element
+        in the list
+    :return: list; a new list containing only unique elements of the original list in their initial order.
+        Original list is not modified.
 
     >>> from pyams_utils.list import unique
     >>> mylist = [1, 2, 3, 2, 1]
@@ -35,6 +39,7 @@
     [3, 2, 1, 4]
 
     You can also set an 'id' function applied on each element:
+
     >>> mylist = [1, 2, 3, '2', 4]
     >>> unique(mylist, idfun=str)
     [1, 2, 3, 4]