python - 如何使用 px.bar() 在堆积条形图中显示百分比值？

Question

需要与数值一起显示%符号。请检查下面的附图。有什么办法可以在数值上添加%符号吗？

# Import pandas library
import pandas as pd
 
# initialize list of lists
data = [['2017/2018', 'Renewable',21], ['2018/2019', 'Renewable',42], ['2019/2020', 'Renewable',75],
       ['2017/2018', 'Non-Renewable',79], ['2018/2019', 'Non-Renewable',58], ['2019/2020', 'Non-Renewable',25]]
 
# Create the pandas DataFrame
df = pd.DataFrame(data, columns = ['Year', 'Energy','Energy Mix %'])
 
# print dataframe.
df


fig = px.bar(df, x="Year", y="Energy Mix %", color="Energy", title="RENEWABLE ENERGY MIX",
             text_auto=True,template='plotly_dark')
fig.show()

Answer 1

您可以使用:

fig.for_each_trace(lambda t: t.update(texttemplate = t.texttemplate + ' %'))

并得到:

完整代码:

# Import pandas library
import pandas as pd
import plotly.express as px
# initialize list of lists
data = [['2017/2018', 'Renewable',21], ['2018/2019', 'Renewable',42], ['2019/2020', 'Renewable',75],
       ['2017/2018', 'Non-Renewable',79], ['2018/2019', 'Non-Renewable',58], ['2019/2020', 'Non-Renewable',25]]
 
# Create the pandas DataFrame
df = pd.DataFrame(data, columns = ['Year', 'Energy','Energy Mix %'])
 
fig = px.bar(df, x="Year", y="Energy Mix %", color="Energy", title="RENEWABLE ENERGY MIX",
             text_auto=True,template='plotly_dark')

fig.for_each_trace(lambda t: t.update(texttemplate = t.texttemplate + ' %'))

fig.show()