Fix 3d plots in examples

diff --git a/examples/menger.py b/examples/menger.py
index 8d258b1..c4413ba 100755 (executable)
--- a/examples/menger.py
+++ b/examples/menger.py
@@ -20,6 +20,7 @@ import matplotlib.pyplot as plt
 from math import ceil
 
 from matplotlib import pylab
+from mpl_toolkits.mplot3d import Axes3D
 
 from linpy import Le, Polyhedron, symbols
 

diff --git a/examples/plots.py b/examples/plots.py
index 4b0f16e..87d2891 100755 (executable)
--- a/examples/plots.py
+++ b/examples/plots.py
@@ -6,6 +6,7 @@
 import matplotlib.pyplot as plt
 
 from matplotlib import pylab
+from mpl_toolkits.mplot3d import Axes3D
 
 from linpy import Ge, Le, symbols