Fix NameError: name 'os' is not defined

cgohlke · web-flow · commit eb92ab70c805 · 2017-10-08T23:49:23.000-07:00
diff --git a/examples/animation/movie_demo_sgskip.py b/examples/animation/movie_demo_sgskip.py
@@ -7,6 +7,7 @@
 
 from __future__ import print_function
 
+import os
 import subprocess
 import matplotlib.pyplot as plt
 import numpy as np
