From 41e9c8d91ac080453c4b040291ec6692d9f48503 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Boulogne?= <devel@sciunto.org>
Date: Sun, 12 Jun 2016 21:00:07 +0200
Subject: [PATCH] DOC: explicit default value behavior

---
 skimage/data/_binary_blobs.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/skimage/data/_binary_blobs.py b/skimage/data/_binary_blobs.py
index 83503151..e4a23984 100644
--- a/skimage/data/_binary_blobs.py
+++ b/skimage/data/_binary_blobs.py
@@ -21,6 +21,7 @@ def binary_blobs(length=512, blob_size_fraction=0.1, n_dim=2,
         Should be in [0, 1].
     seed : int, optional
         Seed to initialize the random number generator.
+        If `None`, a random seed from the operating system is used.
 
     Returns
     -------