update doc comment

zggl · Oct 18, 2019 · 8b9b4f2 · 8b9b4f2
1 parent 87449b6
commit 8b9b4f2
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/deap/tools/emo.py b/deap/tools/emo.py
@@ -146,16 +146,18 @@ def selTournamentDCD(individuals, k):
     """Tournament selection based on dominance (D) between two individuals, if
     the two individuals do not interdominate the selection is made
     based on crowding distance (CD). The *individuals* sequence length has to
-    be a multiple of 4. Starting from the beginning of the selected
-    individuals, two consecutive individuals will be different (assuming all
-    individuals in the input list are unique). Each individual from the input
-    list won't be selected more than twice.
+    be a multiple of 4 only if k is equal to the length of individuals. 
+    Starting from the beginning of the selected individuals, two consecutive 
+    individuals will be different (assuming all individuals in the input list 
+    are unique). Each individual from the input list won't be selected more 
+    than twice.
 
     This selection requires the individuals to have a :attr:`crowding_dist`
     attribute, which can be set by the :func:`assignCrowdingDist` function.
 
     :param individuals: A list of individuals to select from.
-    :param k: The number of individuals to select.
+    :param k: The number of individuals to select. Must be less than or equal 
+              to len(individuals).
     :returns: A list of selected individuals.
     """