根据列表字典中的key更新重复字段

def update_duplicate_fields(data):
    result = []
    for item in data:
        if not result:
            result.append(item)
        else:
            found = False
            for i, r in enumerate(result):
                if item['key'] == r['key']:
                    result[i].update(item)
                    found = True
                    break
            if not found:
                result.append(item)
    return result

# 示例数据
data = [
    {'key': 'A', 'value': 1},
    {'key': 'B', 'value': 2},
    {'key': 'A', 'value': 3},
    {'key': 'C', 'value': 4}
]

updated_data = update_duplicate_fields(data)
print(updated_data)

[
    {'key': 'A', 'value': 3},
    {'key': 'B', 'value': 2},
    {'key': 'C', 'value': 4}
]