Shape instance has no attribute 'parts'

[nfs-jd]

Traceback (most recent call last):
File "test.py", line 19, in
K.generate(config, outfile='test-file.svg')
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/kartograph.py", line 46, in generate
_map = Map(opts, self.layerCache, format=format)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/map.py", line 48, in init
me.proj = me._init_projection()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/map.py", line 88, in _init_projection
map_center = self.__get_map_center()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/map.py", line 140, in __get_map_center
features = self._get_bounding_geometry()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/map.py", line 257, in _get_bounding_geometry
charset=layer.options['charset']
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/layersource/shplayer.py", line 121, in get_features
geom = shape2geometry(shp, ignore_holes=ignore_holes, min_area=min_area, bbox=bbox, proj=self.proj)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/layersource/shplayer.py", line 153, in shape2geometry
geom = shape2polygon(shp, ignore_holes=ignore_holes, min_area=min_area, proj=proj)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/kartograph.py-0.6.8-py2.7.egg/kartograph/layersource/shplayer.py", line 170, in shape2polygon
parts = shp.parts[:]
AttributeError: _Shape instance has no attribute 'parts'

Can I get help troubleshooting? Script worked fine with a different source file. And pyshp/shapefile has no issue reading this source file on its own.