将垂直虚线动态放在最长条的末尾(plotly，python)

pip install plotly

import plotly.graph_objects as go

# 定义数据
categories = ['A', 'B', 'C', 'D', 'E']
values = [10, 20, 15, 25, 30]

# 创建条形图
fig = go.Figure(data=go.Bar(x=categories, y=values))

# 找到最长条的索引
max_index = values.index(max(values))

# 在最长条的末尾添加垂直虚线
fig.add_shape(
    type="line",
    x0=max_index + 0.5,
    y0=0,
    x1=max_index + 0.5,
    y1=max(values),
    line=dict(
        color="red",
        width=1,
        dash="dash"
    )
)

# 显示图表
fig.show()