Python匹配大小写（开关）无效语法？ [复制]

Question

使用 python 3.7.3。 所有文档都指向这是在 python 中执行 switch 语句的正确方法。不知道为什么它不起作用。我应该导入匹配吗？ 下面有语法错误。

    match player:
               ^

def evaluate(player, ai):
    match player:
        case Choice.rock:
            if ai == Choice.rock:
                return "draw"
            elif ai == Choice.scissors:
                return "player wins"
            elif ai == Choice.paper:
                return "ai wins"
        case Choice.paper:
            if ai == Choice.rock:
                return "player wins"
            elif ai == Choice.scissors:
                return "ai wins"
            elif ai == Choice.paper:
                return "draw" 
        case Choice.scissors:
            if ai == Choice.rock:
                return "ai wins"
            elif ai == Choice.scissors:
                return "draw"
            elif ai == Choice.paper:
                return "player wins"

Answer 1

match 需要 python 版本 >= 3.10，见what's new