From 93e2efd5c82242fb2e19463d29e65d04601d1e8c Mon Sep 17 00:00:00 2001
From: Jae-Joon Lee <lee.j.joon@gmail.com>
Date: Mon, 8 Aug 2011 23:50:03 +0900
Subject: [PATCH] restore 'None' (a string) as a valid marker style (draw
 nothing)

---
 lib/matplotlib/markers.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/matplotlib/markers.py b/lib/matplotlib/markers.py
index 6b6612490a78..cd0116031aa7 100644
--- a/lib/matplotlib/markers.py
+++ b/lib/matplotlib/markers.py
@@ -90,6 +90,7 @@ class MarkerStyle:
         CARETRIGHT : 'caretright',
         CARETUP    : 'caretup',
         CARETDOWN  : 'caretdown',
+        "None"       : 'nothing',
         None       : 'nothing',
         ' '        : 'nothing',
         ''         : 'nothing'