fixing travis

examples/python_fill_cpp.py

@@ -0,0 +1,12 @@
+import histogram as bh
+import cpp_filler
+
+h = bh.histogram(bh.axis.regular(5, -5, 5, "x"),
+                 bh.axis.regular(5, -5, 5, "y"))
+
+cpp_filler.process(h) # histogram is filled with input values in c++
+
+for iy in range(h.axis(1).bins):
+    for ix in range(h.axis(0).bins):
+        print "%3i" % h.value(ix, iy),
+    print