diff --git a/examples/mesh/bc_demo.py b/examples/mesh/bc_demo.py
index 6b198fd3b..3521d7fee 100644
--- a/examples/mesh/bc_demo.py
+++ b/examples/mesh/bc_demo.py
@@ -1,10 +1,9 @@
 # test the boundary fill routine
 
 
-import numpy as np
-
 import mesh.boundary as bnd
 import mesh.patch
+import numpy as np
 
 
 def doit():
diff --git a/pyro/util/io_pyro.py b/pyro/util/io_pyro.py
index d3812b4f8..8188b53b3 100644
--- a/pyro/util/io_pyro.py
+++ b/pyro/util/io_pyro.py
@@ -6,7 +6,7 @@
 import h5py
 
 import pyro.mesh.boundary as bnd
-from pyro.mesh.patch import CellCenterData2d, Cartesian2d, SphericalPolar
+from pyro.mesh.patch import Cartesian2d, CellCenterData2d, SphericalPolar
 from pyro.particles import particles