Update plot, remove old data show new data

issue に示されている _make_empty_graph と _make_graph のエントリーポイントから始め、FigureCanvasTkAgg のセットアップと graph_frame のクリーンアップを含めます。plotting API が既存の figure の置き換えをどのように処理するか、また要求された空の初期グラフと後続のインジケーターがサポートされているかを確認します。完了とするには、文書化され合意されたアプローチが必要ですが、具体的なリポジトリファイルやテストは特定されていません。

Thanks for an amazing library!

I'm trying to create an application where the user can select a ticker and then click a button that prints candlesticks for the ticker. I'm plotting the graph inside a frame in Tkinter.

The user can select a ticker in the drop down and Graph the data for the ticker.

I first create the empty graph

def _make_empty_graph(self):

    self.fig = mpf.figure()     
    self.canvas = FigureCanvasTkAgg(self.fig, self.graph_frame)
    self.canvas.get_tk_widget().pack()

I then create the graph with data from a dataframe, after the user has selected a ticker and clicked "Graph". I destroy the children in the frame to not add another graph under the previous graph. The user can then select yet another ticker and graph it.

def _make_graph(self, ticker_data=None):

    self._get_ticker_data()

    for widgets in self.graph_frame.winfo_children():
        widgets.destroy()

    self.fig, _ = mpf.plot(self.ticker_df, type='candle', 
        title = f'{self.ticker_var.get()}',
        volume=True, style='binance', returnfig=True)


    self.canvas = FigureCanvasTkAgg(self.fig, self.graph_frame)
    self.canvas.get_tk_widget().pack()

Can I solve this a bit more elegant by using subplots or similar and then just clear the graph before I create the new graph? I still want to show an empty graph in the beginning. Do I need to create the empty graph in some other way to be able to update it later? Later on I like to add buttons to be able to RSI, Bollinger bands etc. on top the candlesticks.

Suggestions are greatly appreciated.