def __init__(self, *args, **kwargs):
# application status
self.registry = Registry(kwargs.pop('registry_home', None),
create=True)
# create datasource
self.datasource = Datasource()
# create pipeline
self.pipeline = PipelineTree(datasource=self.datasource)
# let super's __init__ call OnInit()
wx.App.__init__(self, *args, **kwargs)
