Rotation angle between 0 and 360.

Also add a test for this

Author: jenshnielsen

lib/matplotlib/tests/test_text.py

@@ -4,6 +4,7 @@
 import six
 
 import numpy as np
+from numpy.testing import assert_almost_equal
 import matplotlib
 from matplotlib.testing.decorators import image_comparison, knownfailureif, cleanup
 import matplotlib.pyplot as plt
@@ -271,3 +272,9 @@ def test_get_rotation_raises():
 def test_get_rotation_none():
     from matplotlib import text
     assert text.get_rotation(None) == 0.0
+
+
+def test_get_rotation_mod360():
+    from matplotlib import text
+    for i, j in zip([360., 377., 720+177.2], [0., 17., 177.2]):
+        assert_almost_equal(text.get_rotation(i), j)

lib/matplotlib/text.py

@@ -45,7 +45,8 @@ def _process_text_args(override, fontdict=None, **kwargs):
 # Extracted from Text's method to serve as a function
 def get_rotation(rotation):
     """
-    Return the text angle as float.
+    Return the text angle as float. The returned
+    angle is between 0 and 360 deg.
 
     *rotation* may be 'horizontal', 'vertical', or a numeric value in degrees.
     """
@@ -62,7 +63,7 @@ def get_rotation(rotation):
                              " 'vertical', numeric value or"
                              "None".format(rotation))
 
-    return angle
+    return angle % 360
 # these are not available for the object inspector until after the
 # class is build so we define an initial set here for the init
 # function and they will be overridden after object defn