如何在legendgroup内单独显隐线条及实现组间嵌套分组

需求1：组内单线条独立控制 + 组批量控制 #

已通过legendgroup对多条go.Scatter线条分组，点击组可批量显隐组内线条。现在需要实现：

• 既能单独控制组内每条线条的显隐（部分线条初始设为隐藏状态）
• 点击legendgroup仍能一键控制组内所有线条（包括填充区域）的显隐

示例代码：

traceList.append(go.Scatter(x=datePrices, y=dfAreas.extendLow, mode='lines', name='extendLow',
                              line_color=LAVENDER, fill=None, visible="legendonly", legendgroup="AREA"))
traceList.append(go.Scatter(x=datePrices, y=dfAreas.AREAHAlow, mode='lines', name='AREALow', 
                              line_color="rgb(255,0,255)", fill= None, fillcolor=AREA_FILL, legendgroup="AREA"))
traceList.append(go.Scatter(x=datePrices, y=dfAreas.AREAHAclose, mode='lines', name='AREA',
                              line_color=AREA, fill=None, fillcolor=AREA_FILL, line_width=3, legendgroup="AREA")) 
traceList.append(go.Scatter(x=datePrices, y=dfAreas.AREAHAhigh, mode='lines', name='AREAHigh',
                              line_color=AREA_UP, fill="tonexty", fillcolor=AREA_FILL, legendgroup="AREA"))                             
traceList.append(go.Scatter(x=datePrices, y=dfAreas.extendHigh, mode='lines', name='extendHigh',
                              line_color=LAVENDER, fill="tonexty", visible="legendonly", legendgroup="AREA"))    

需求2：legendgroup嵌套分组 #

现有"Gains"和"Losses"两个legendgroup分组，需要将这两个组再组合，实现一键批量显隐这两个组的所有线条。

示例代码：

traceList.append(go.Scatter(x=dfGainsOne.date, y=dfGainsOne.close, mode='lines', name='Gains', line_width=3,
                           line_color=colorGains, fill= None, legendgroup="Gains", showlegend=True)) 
traceList.append(go.Scatter(x=dfGainsTwo.date, y=dfGainsTwo.close, mode='lines', name='GainsTwo', line_width=3,
                           line_color=colorGains, fill= None, legendgroup="Gains", showlegend=False)) 
traceList.append(go.Scatter(x=dfLossesOne.date, y=dfLossesOne.close, mode='lines', name='Losses', line_width=3,
                           line_color=colorLosses, fill= None, legendgroup="Losses", showlegend=True)) 
traceList.append(go.Scatter(x=dfLossesTwo.date, y=dfLossesTwo.close, mode='lines', name='LossesTwo', line_width=3,
                           line_color=colorLosses, fill= None, legendgroup="Losses", showlegend=False)) 

补充说明 #

若建议通过弹窗实现上述操作，请提供相关示例代码（禁止外链跳转）

内容的提问来源于stack exchange，提问作者SoftwareTester