test with example_streamline.ows
Traceback (most recent call last):
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 609, in scheme_to_etree
data, format = dumps(node.properties, format=data_format,
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 711, in dumps
return (literal_dumps(obj, indent=1 if prettyprint else None),
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 857, in literal_dumps
check_relaxed(obj)
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 842, in check_relaxed
return all(map(check_relaxed, chain(obj.keys(), obj.values())))
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 842, in check_relaxed
return all(map(check_relaxed, chain(obj.keys(), obj.values())))
File "/media/payno/830add5c-f5d7-4db2-875e-03be4f0a67f0/dev/workflow/orange/orange-canvas-core/orangecanvas/scheme/readwrite.py", line 853, in check_relaxed
raise TypeError("{0} can not be serialized as a python "
TypeError: <enum '_DisplayMode'> can not be serialized as a python literal