Python 为什么没有定义目标

我正在用discord.py编写discord economy机器人程序，但我的共享命令不起作用：

if message.content.startswith('bott share'):
        try:
            target, amount = message.content.split(' ')[1:]
            amount = int(amount)
        except ValueError:
            await message.channel.send('Invalid Arguments')
        target = target[2:-1]
        if target[0] == '!':
            target = target[1:]
        target = int(target)
        if amount > getcoins(user):
            await message.channel.send('ARE YOU TRYING TO HJACK THE SYSTEM?')
        elif amount < 0:
            await message.channel.send('ARE YOU TRYING TO HJACK THE SYSTEM?')
        setcoins(user, getcoins(user)-amount)
        setcoins(target, getcoins(target)+amount)
        await message.channel.send(f'You gave {target} {amount}, and now you have {getcoins(user)}.')

当你跑的时候

 target, amount = message.content.split(' ')[1:]

然后会有错误，它不会创建变量target，amount，但在捕获此错误后，您运行target[2:-1]，然后它会尝试从不存在的变量中获取值

你可以把所有的东西都放进去试试看

if message.content.startswith('bott share'):
    try:
        target, amount = message.content.split(' ')[1:]
        amount = int(amount)
            target = target[2:-1]
        if target[0] == '!':
            target = target[1:]
        target = int(target)
        if amount > getcoins(user):
            await message.channel.send('ARE YOU TRYING TO HJACK THE SYSTEM?')
        elif amount < 0:
            await message.channel.send('ARE YOU TRYING TO HJACK THE SYSTEM?')
        setcoins(user, getcoins(user)-amount)
        setcoins(target, getcoins(target)+amount)
        await message.channel.send(f'You gave {target} {amount}, and now you have {getcoins(user)}.')
    except ValueError:
        await message.channel.send('Invalid Arguments')

或者最终-但如果目标为空字符串或金额为0，则if将给出False

若在函数中运行此代码，那个么可以使用return to finish函数

    try:
        target, amount = message.content.split(' ')[1:]
        amount = int(amount)
    except ValueError:
        await message.channel.send('Invalid Arguments')
        return  # finish function

---

我会尝试打印目标，看看它是否包含您认为它所包含的内容。@Chris它不起作用，但感谢这应该是您的第一个错误指示。如果try块的第一行失败，则不会为target或amount分配任何值。您需要：A为这些变量预先赋值，B在except子句中为它们赋值，或C让except子句完全退出函数，这样您就不会在这些变量没有值的情况下继续操作。target，amount=message.content.split'[1:]当且仅当message.content.split'[1:]长度为2，但可能不是。如果/当失败时，您的目标不会被分配。

    target = None
    amount = None

    try:
        target, amount = message.content.split(' ')[1:]
        amount = int(amount)
    except ValueError:
        await message.channel.send('Invalid Arguments')

    if target is not None and amount is not None:
       target = target[2:-1]
       # ... rest ...

    if target and amount:
       target = target[2:-1]
       # ... rest ...

    try:
        target, amount = message.content.split(' ')[1:]
        amount = int(amount)
    except ValueError:
        await message.channel.send('Invalid Arguments')
        return  # finish function