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How To Create An Interactive Population Pyramid in Python Using Plotly

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In this tutorial, I will show you, how to create an interactive population pyramid in python by using the library “Plotly”.

 

📝 Resources:

Download the Python Code and files used in the tutorial here:

Download Here

 

Population Pyramid Data: https://www.populationpyramid.net/japan/1950/

Population Pyramid “X-Mas”-Edition: http://xmas-sven.herokuapp.com/

 

👩‍💻 Source Code:

import pandas as pd
import plotly.graph_objs as go
import plotly # To export chart to HTML

# CSV VERSION
# df = pd.read_csv('Japan-1950.csv')

# EXCEL VERSION --> Need to install openpyxl: pip install openpyxl
df = pd.read_excel('Japan-1950.xlsx')

y = df['Age']
x1 = df['M']
x2 = df['F'] * -1


# Create instance of the figure
fig = go.Figure()

# Add Trace to Figure
fig.add_trace(go.Bar(
        y=y,
        x=x1,
        name='Male',
        orientation='h'
))

# Add Trace to figure
fig.add_trace(go.Bar(
        y=y,
        x=x2,
        name='Female',
        orientation='h'
))

# Update Figure Layout
fig.update_layout(
    template = 'plotly_white',
    title= 'Age Pyramid Japan 1950',
    title_font_size = 24,
    barmode='relative',
    bargap=0.0,
    bargroupgap=0,
    xaxis=dict(
        tickvals=[-4000000,-2000000,0,2000000,4000000],
        ticktext=['4M','2M','0','2M','4M'],
        title='Population in Mio',
        title_font_size=14
    )
)

# Plot figure
fig.show()

# Export Candlestick to HTML
plotly.offline.plot(fig, filename='population_pyramid.html')