future-friendly check for scipy.sparse version

theano/sparse/__init__.py

@@ -4,7 +4,7 @@ enable_sparse=True
 
 try:
     import scipy
-    if not scipy.__version__.startswith('0.7.'):
+    if scipy.__version__ < '0.7':
         sys.stderr.write("WARNING: scipy version = %s. We request version >=0.7.0 for the sparse code as it has bugs fixed in the sparse matrix code.\n" % scipy.__version__)
         enable_sparse=False
 except ImportError: