From 7e00a9338a734adeb20f81a0443e59772928f9cc Mon Sep 17 00:00:00 2001
From: Christoph Groth <christoph.groth@cea.fr>
Date: Tue, 7 May 2013 11:02:30 +0200
Subject: [PATCH] make examples/square.py work again

---
 examples/square.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/square.py b/examples/square.py
index 14e0bd27..d390d9c5 100644
--- a/examples/square.py
+++ b/examples/square.py
@@ -8,7 +8,7 @@ from matplotlib import pyplot
 import kwant
 from kwant.physics.selfenergy import square_self_energy
 
-__all__ = ['System' ]
+__all__ = ['System']
 
 class Lead(object):
     def __init__(self, width, t, potential):
@@ -16,7 +16,7 @@ class Lead(object):
         self.t = t
         self.potential = potential
 
-    def self_energy(self, fermi_energy):
+    def self_energy(self, fermi_energy, args=()):
         return square_self_energy(self.width, self.t, self.potential,
                                   fermi_energy)
 
-- 
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