如何使用python-pptx模块在Power Point中绘制带有标签和标题的折线图中的添加垂直线？

如何解决如何使用python-pptx模块在Power Point中绘制带有标签和标题的折线图中的添加垂直线？

由于存在不同的问题，我将基于此提出一个新问题：

How to plot particular line chart with labels and titles in power point using python-pptx module?

我有一个像这样的数据集：

 A       B       C       D
AR    20201     1     200
AR    20202     1     300
AR    20203     1     1000
AR    20204     1     3000
AR    20205     1     700
AR    20206     1     800
AR    20207     1     900

AR    20201     2    1000
AR    20202     2    2000
AR    20203     2    3000
AR    20204     2    4000
AR    20205     2    5676
AR    20206     2    6000
AR    20207     2    1000

AR    20201     3   4500
AR    20202     3   4567
AR    20203     3   1000
AR    20204     3   900
AR    20205     3   600
AR    20206     3   200
AR    20207     3  100

==========================
BR    20201     1
BR    20202     1
BR    20203     1
BR    20204     1
BR    20205     1
BR    20206     1
BR    20207     1

BR    20201     2
--    ----     ---

我正在使用循环在ppt中创建多重折线图。对于国家/地区（A列）= AR，我正在同一图上绘制不同C = 1,2和3的折线图。在Y轴上，我将有D列，在X轴上，我将有B列

这是一个国家/地区的代码：

chart_data = ChartData()
cat=['202001','202002','202003','202004','202005','202006','202007']
chart_data.categories = cat
    
for i in list(data["C"].unique()):
            
    chart_data.add_series(i,tuple(data[data['C']==i]['D']))
    x,y,cx,cy = Inches(1),Inches(1),Inches(10.5),Inches(6)
    chart = slide.shapes.add_chart(XL_CHART_TYPE.LINE,x,cy,chart_data).chart

    chart.has_legend = True
    chart.legend.include_in_layout = False
    chart.series[0].smooth = True

这是我得到的输出：

预期输出为

How can I add a dotted vertical line,move the legend to the top and change font size of legend,and finally to add xlabel,ylabel and titles using the above code?