moved numpy compatibility stuff to a new file

Author: cdellin

src/prpy/__init__.py

@@ -32,3 +32,4 @@
 from named_config import ConfigurationLibrary
 from clone import Clone, Cloned
 from bind import bind_subclass
+import compatibility

src/prpy/compatibility.py

@@ -0,0 +1,14 @@
+from distutils.version import LooseVersion
+import numpy
+
+# handle older versions of numpy without norm axis argument
+if LooseVersion(numpy.__version__) < LooseVersion('1.8.0'):
+    oldnorm = numpy.linalg.norm
+    def newnorm(x, ord=None, axis=None):
+        if axis is None:
+            return oldnorm(x, ord=ord)
+        elif isinstance(axis, (int,long)):
+            return numpy.apply_along_axis(lambda x: oldnorm(x,ord=ord), axis, x)
+        else:
+            raise NotImplementedError('older numpy without norm axis')
+    numpy.linalg.norm = newnorm

src/prpy/ik_ranking.py

@@ -28,21 +28,8 @@
 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
-from distutils.version import LooseVersion
 import numpy
 
-# handle older versions of numpy without norm axis argument
-if LooseVersion(numpy.__version__) < LooseVersion('1.8.0'):
-    oldnorm = numpy.linalg.norm
-    def newnorm(x, ord=None, axis=None):
-        if axis is None:
-            return oldnorm(x, ord=ord)
-        elif isinstance(axis, (int,long)):
-            return numpy.apply_along_axis(oldnorm, axis, x)
-        else:
-            raise NotImplementedError('older numpy without norm axis')
-    numpy.linalg.norm = newnorm
-
 def NoRanking(robot, ik_solutions):
     """
     Return IK solutions with an arbitrary ranking.