ChatGPT: Как шаблоны промптов улучшают качество вашего кода?

# Проблемный код
def calculate_average_cpc(campaigns: list[dict]) -> float:
    total_cost = 0
    total_clicks = 0
    for campaign in campaigns:
        total_cost += campaign['cost']
        total_clicks += campaign['clicks']

    # Ошибка может быть здесь, если total_clicks равен 0
    average_cpc = total_cost / total_clicks
    return average_cpc

# Пример использования
data = [
    {'campaign_id': 'A', 'clicks': 100, 'cost': 150.0},
    {'campaign_id': 'B', 'clicks': 50, 'cost': 75.0},
    {'campaign_id': 'C', 'clicks': 0, 'cost': 0.0} # Кампания без кликов
]

# print(calculate_average_cpc(data)) # Может вызвать ZeroDivisionError

def calculate_average_cpc(campaigns: list[dict]) -> float:
    """
    Calculates the average Cost Per Click (CPC) for a list of campaigns.

    Args:
        campaigns: A list of dictionaries, where each dictionary represents a campaign
                   with 'clicks' and 'cost' keys.

    Returns:
        The calculated average CPC. Returns 0.0 if total clicks are zero to prevent ZeroDivisionError.
    """
    total_cost = 0.0 # Использование float для точности
    total_clicks = 0

    for campaign in campaigns:
        # Убедимся, что ключи существуют, хотя в этом примере они гарантированы структурой
        total_cost += campaign.get('cost', 0.0)
        total_clicks += campaign.get('clicks', 0)

    # Проверка деления на ноль
    if total_clicks == 0:
        return 0.0
    else:
        return total_cost / total_clicks

# Пример использования
data_with_zero_clicks = [
    {'campaign_id': 'A', 'clicks': 100, 'cost': 150.0},
    {'campaign_id': 'B', 'clicks': 50, 'cost': 75.0},
    {'campaign_id': 'C', 'clicks': 0, 'cost': 0.0}
]

data_only_zero_clicks = [
     {'campaign_id': 'D', 'clicks': 0, 'cost': 10.0},
     {'campaign_id': 'E', 'clicks': 0, 'cost': 0.0}
]

print(f"CPC for data_with_zero_clicks: {calculate_average_cpc(data_with_zero_clicks):.2f}") # Вывод: 1.50
print(f"CPC for data_only_zero_clicks: {calculate_average_cpc(data_only_zero_clicks):.2f}") # Вывод: 0.00

// Оригинальный код
/**
 * Processes a list of user events.
 * @param {Array