medium Data Visualisation

Payment Method Pie Chart

The Brief

The finance team wants a pie chart showing the proportion of revenue collected via each payment method (Cash, Card, Online). Build a pie chart with percentage labels on each slice, a legend, and an exploded slice for the largest segment. Save as PNG.

Acceptance Criteria

Tap a criterion to mark it off as you work. Tap a category header to expand or collapse.

4 Set autopct to show percentages on each slice formatted to 1 decimal place

6 Use the explode parameter to pop out the largest slice slightly

9 Print a confirmation message

2 Group the data by Payment_Method and sum the Amount column

5 Provide labels for each slice that match the payment methods

1 Set the matplotlib backend to Agg before importing pyplot

3 Create a pie chart using plt.pie with the totals as the data

7 Add a chart title

8 Save as payment_pie.png

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solution.py

Python 3

import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
import pandas as pd
import io

data = """Date,Payment_Method,Amount
2024-06-01,Card,420
2024-06-01,Cash,180
2024-06-01,Online,250
2024-06-02,Card,510
2024-06-02,Cash,150
2024-06-02,Online,300
2024-06-03,Card,480
2024-06-03,Cash,210
2024-06-03,Online,280"""

df = pd.read_csv(io.StringIO(data))

# Group by Payment_Method, sum Amount
# Create pie chart with percentages and an exploded slice
# Save as payment_pie.png

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