Raises if default config of axis and scales are overriden

Author: palnabarun

mplaltair/_axis.py

@@ -37,8 +37,15 @@ def convert_axis(ax, chart):
 
     Raises
     ------
+    NotImplementedError
+        For various reasons
 
     """
+    if chart.to_dict().get('config').get('axis'):
+        raise NotImplementedError
+
+    if chart.to_dict().get('config').get('scale'):
+        raise NotImplementedError
 
     for enc_channel, enc_spec in chart.to_dict['encoding']:
         if enc_channel in ['x', 'y']: