rename utils module to util

src/mdptoolbox/__init__.py

@@ -11,7 +11,7 @@ example
     Examples of transition and reward matrices that form valid MDPs
 mdp
     Makov decision process algorithms
-utils
+util
     Functions for validating and working with an MDP
 
 How to use the documentation
@@ -84,4 +84,4 @@ if __name__ == "__main__":
     import doctest
     doctest.testfile("example.py", module_relative=True)
     doctest.testfile("mdp.py", module_relative=True)
-    doctest.testfile("utils.py", module_relative=True)
+    doctest.testfile("util.py", module_relative=True)

src/mdptoolbox/mdp.py

@@ -64,7 +64,7 @@ from numpy import absolute, array, empty, mean, mod, multiply, ones, zeros
 from numpy.random import randint, random
 from scipy.sparse import csr_matrix as sparse
 
-from .utils import check, getSpan
+from .util import check, getSpan
 
 MSG_STOP_MAX_ITER = "Iterating stopped due to maximum number of iterations " \
     "condition."