在 plotly express 条形图中反转图例顺序而不更改条形顺序

Question

我想更改plotly.express条形图图例中项目的顺序。例如，我想在此图上显示午餐前的晚餐（当前行为对于水平条形图尤其尴尬，因为条形的顺序与图例顺序相反）：

import plotly.express as px

df = px.data.tips()

# Sort to put dinner on top.

df.sort_values('time', ascending=False, inplace=True)

fig = px.bar(df, y='sex', x='total_bill', color='time', barmode='group',

             orientation='h')

fig.update_layout(yaxis={'categoryorder': 'total ascending'})

fig.show()

Answer 1

添加legend={'traceorder': 'reversed'}到update_layout声明中：import plotly.express as pxdf = px.data.tips()# Sort to put dinner on top.df.sort_values('time', ascending=False, inplace=True)fig = px.bar(df, y='sex', x='total_bill', color='time', barmode='group',             orientation='h')fig.update_layout(yaxis={'categoryorder': 'total ascending'},                  legend={'traceorder': 'reversed'})fig.show()