python - 包含元组的列表转 JSON，更好的做法？

Answer 1

result = {}
result['categories'] = []
for year, month, level, number in rs:
    if level not in result:
        result[level] = [0, 0, 0, 0]
        result[level][month-1] = number
    category = '{0}-{1}'.format(year, month)
    if category not in result['categories']:
        result['categories'].append(category)