Fix transposable_node in case all attributes are not there.

docs/changelog.rst

@@ -2,11 +2,17 @@
 Changelog
 =========
 
+2.0.10
+======
+
+* Fix transposable_node in case all attributes are not there. (thanks @yobuntu).
+
+
 2.0.9
 =====
 
 * Add `dynamic_print_values` to show print_values on legend hover. (#279)
-* Fix unparse_color for python 3.5+ compatibility (thanks felixonmars, sjourdois)
+* Fix unparse_color for python 3.5+ compatibility (thanks @felixonmars, @sjourdois)
 * Process major labels as labels. (#263)
 * Fix labels rotation > 180 (#257)
 * Fix secondary axis

pygal/__init__.py

@@ -24,7 +24,7 @@ and the maps extensions namespace module.
 
 """
 
-__version__ = '2.0.9'
+__version__ = '2.0.10'
 
 import pkg_resources
 import sys

pygal/svg.py

@@ -205,7 +205,14 @@ class Svg(object):
             for key1, key2 in (('x', 'y'), ('width', 'height'), ('cx', 'cy')):
                 attr1 = extras.get(key1, None)
                 attr2 = extras.get(key2, None)
-                extras[key1], extras[key2] = attr2, attr1
+                if attr2:
+                    extras[key1] = attr2
+                elif attr1:
+                    del extras[key1]
+                if attr1:
+                    extras[key2] = attr1
+                elif attr2:
+                    del extras[key2]
         return self.node(parent, tag, attrib, **extras)
 
     def serie(self, serie):