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[bugfix] NoneType df has no attribute to_dict in IFrame #5965

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2 changes: 2 additions & 0 deletions superset/viz.py
Original file line number Diff line number Diff line change
Expand Up @@ -1826,6 +1826,8 @@ def query_obj(self):
def get_df(self, query_obj=None):
return None

def get_data(self, df):
return None

class ParallelCoordinatesViz(BaseViz):

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