Discord.py检查输入是否为int

Question

我正在尝试使用discord.py为我的机器人编写一个抽奖命令，并希望它使用户可以执行以下命令来启动抽奖：

！raffle时间冠军头衔EG：！raffle 60 1派

我遇到的问题是创建验证以检查前两个输入是否为数字以及标题是否为空白。 目前，这是命令的代码：

@bot.command(pass_context=True)
async def raffle(ctx, time, winners, title):    

    if time != int or winners != int or title != "":
        await bot.say("{} raffle has been started for {} seconds and there will be {} winner(s)!".format(title, time, winners))
    else:
        await bot.say("Seems you went wrong! Raffle format is: !raffle time winners title")
        return

但是，我没有运气，并遇到以下错误：

Ignoring exception in command raffle
Traceback (most recent call last):
  File "C:\Users\kairj\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\bot.py", line 846, in process_commands
    yield from command.invoke(ctx)
  File "C:\Users\kairj\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 367, in invoke
    yield from self.prepare(ctx)
  File "C:\Users\kairj\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 345, in prepare
    yield from self._parse_arguments(ctx)
  File "C:\Users\kairj\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 304, in _parse_arguments
    transformed = yield from self.transform(ctx, param)
  File "C:\Users\kairj\AppData\Local\Programs\Python\Python36-32\lib\site-packages\discord\ext\commands\core.py", line 212, in transform
    raise MissingRequiredArgument('{0.name} is a required argument that is missing.'.format(param))
discord.ext.commands.errors.MissingRequiredArgument: time is a required argument that is missing.

任何帮助都将非常有用，因为我确信这是某个地方的简单错误！

提前致谢

Answer 1

尝试使用isinstance代替：

if not isinstance(time, int)

Answer 2

您定义的实际上是两个检查。 第一个是要确保命令中有3个参数，第二个是要确保前两个参数是整数。

第一个实际上是内部由ext.commands处理的。 要捕获它，您将需要定义一个on_command_error事件方法。

@bot.event
def on_command_error(exc, ctx):
    if isinstance(exc, commands.errors.MissingRequiredArgument):
        # Send a message here
        return

    # If nothing is caught, reraise the error so that it goes to console.
    raise exc

第二个是检查整数，就像@Luke McPuke所说的那样

if not isinstance(time, int)