def __init__(self, url, panel):
super(InferencePanel, self).__init__()
self.history = list()
self.panel = panel
self.callback = False
self.updater = Updater()
self.parser = Parser()
self.programme_main = self.parser.read(url)
self.choices = dict()
self.programme_init = self.programme_main.clone()
self.idp = IDP()
self.pnlProgramme = GroupPanel(self.programme_main, self)
self.svHistory = ScrollView()
self.dbOptions = DropDown()
self.btnSelect = Button(text='Select Term',
size_hint_y=None,
height=30)
self.build()
self.callback = True
self.update([])
