BUG: change _node to node
@@ -180,7 +180,7 @@ class TopLevelMixin(object):
with open(outfile, 'w') as f:
f.write(self.to_html())
else:
- supported = _node.SUPPORTED_FILETYPES + ['json', 'html']
+ supported = node.SUPPORTED_FILETYPES + ['json', 'html']
raise ValueError('Cannot save chart of type {0}; supported'
'extensions are {1}'.format(filetype, supported))
