How to display percentages values in stacked bar chart using px.bar()?

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Need to display % sign along with the numeric value. Please check below attached graph. I there any way to add % sign with numeric value?

# 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()

enter image description here

plotly-python plotly bar-chart python-3.x python
1 Answers

You can use:

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

And get:

enter image description here

Complete code:

# 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()
user_34377870
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