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我的代码是：

fig = make_subplots(rows = 1, cols = 1, shared_xaxes = True, subplot_titles = 
(currency_name+' '+timeframe), vertical_spacing = 0.1, row_width = [0.6])

# ----------------
# Candlestick Plot
fig.add_trace(go.Candlestick(x = chart.index, open = chart['open'], high = 
chart['high'], low = chart['low'], close = chart['close'], showlegend=False, name = 
'candlestick'), row = 1, col = 1)

# Moving Average
fig.add_trace(go.Scatter(x = chart.index, y = chart['middle_band'], line_color = 
'green', name = 'middle_band', opacity = 0.5), row = 1, col = 1)

# Upper Bound
fig.add_trace(go.Scatter(x = chart.index, y = chart['upper_band'], line_color = 
'green', name = 'upper band', opacity = 0.7), row = 1, col = 1)

# Lower Bound
fig.add_trace(go.Line(x = chart.index, y = chart['lower_band'], line_color = 'green', 
name = 'lower band', opacity = 0.7), row = 1, col = 1)

fig.update_layout(
title='Bolindger Bands',
yaxis_title=currency[5]+' '+timeframe,
shapes = [dict(
    x0=chart.index[0].to_pydatetime(), x1=chart.index[0].to_pydatetime(), y0=0.1, 
y1=0.2, xref='x', yref='paper',
    line_width=1)],
annotations=[dict(
    x=chart.index[0].to_pydatetime(), y=0.01, xref='x', yref='paper',
    showarrow=False, xanchor='right', text=str(candle_pattern)+ ' here')])

# Remove range slider; (short time frame)
fig.update(layout_xaxis_rangeslider_visible=False)

fig.show()

我得到了带有烛台和指标的漂亮图片，但我找不到如何将其保存为 png 的方法？

fig.savefig() 不适用于 make_subplots。如何将我在 fig.show() 之后得到的那张图片准确地保存到 png 中？

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