Here is an example of a Python dictionary in JSON format containing information about major African countries for Airbnb investment with ROI (Return on Investment): ```python import json countries_data = { 'Nigeria': { 'capital': 'Abuja', 'population': 200963599, 'currency': 'Naira', 'average_daily_rate': 50, 'occupancy_rate': 60, 'ROI': 11.5 }, 'South Africa': { 'capital': 'Pretoria', 'population': 58558270, 'currency': 'Rand', 'average_daily_rate': 70, 'occupancy_rate': 70, 'ROI': 13.2 }, 'Egypt': { 'capital': 'Cairo', 'population': 100549585, 'currency': 'Egyptian Pound', 'average_daily_rate': 60, 'occupancy_rate': 65, 'ROI': 12.8 }, 'Kenya': { 'capital': 'Nairobi', 'population': 47564296, 'currency': 'Kenyan Shilling', 'average_daily_rate': 45, 'occupancy_rate': 55, 'ROI': 10.3 }, 'Morocco': { 'capital': 'Rabat', 'population': 36471769, 'currency': 'Moroccan Dirham', 'average_daily_rate': 55, 'occupancy_rate': 50, 'ROI': 9.7 } } json_data = json.dumps(countries_data, indent=4) print(json_data) ``` This dictionary includes information such as country name, capital, population, currency, average daily rate, occupancy rate, and ROI for each country. You can add more African countries or modify the existing data to suit your requirements.