print function for python 3 in cuboid_mesh

Author: logicabrity

fidimag/common/cuboid_mesh.py

@@ -26,6 +26,7 @@
 in the innermost loop, and the z-axis in the outermost loop!
 
 """
+from __future__ import print_function
 import os
 import numpy as np
 from textwrap import dedent
@@ -278,7 +279,7 @@ def check_size(self, system_memory_fake_for_testing=None):
 
         if 2 * size_coordinates_GiB > mem_GiB:
             # print because no logging yet
-            print "Warning! Size of mesh coordinates i {} GiB.".format(size_coordinates_GiB)
-            print "You have {} GiB system memory. Possible halt.".format(mem_GiB)
+            print("Warning! Size of mesh coordinates i {} GiB.".format(size_coordinates_GiB))
+            print("You have {} GiB system memory. Possible halt.".format(mem_GiB))
             return 1
         return 0