所以我試圖制作一個踢命令，以便如果沒有任何原因，那么它會說“沒有原因”而不是“沒有”。別問為什么。這是我的代碼：@client.command()@commands.has_permissions(kick_members=True)async def kick(ctx, user: discord.Member, *, reason: str): if reason is None: await user.kick() await ctx.send(f"**{user}** has been kicked for **no reason**.") else: await user.kick(reason=reason) await ctx.send(f"**{user}** has been kicked for **{reason}**.")這是錯誤：Ignoring exception in command kick:Traceback (most recent call last): File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py", line 903, in invoke await ctx.command.invoke(ctx) File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 847, in invoke await self.prepare(ctx) File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 784, in prepare await self._parse_arguments(ctx) File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 699, in _parse_arguments kwargs[name] = await self.transform(ctx, param) File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py", line 535, in transform raise MissingRequiredArgument(param)discord.ext.commands.errors.MissingRequiredArgument: reason is a required argument that is missing.我不明白為什么它說“原因是缺少的必需參數”，因為我說如果原因是 None 它會說沒有原因？
3 回答
胡說叔叔
TA貢獻1804條經驗 獲得超8個贊
如果您分配None給reason，那么您可以檢查它。例如reason = None。之后，您可以檢查命令是否原因為None。這是代碼：
@client.command()
@commands.has_permissions(kick_members=True)
async def kick(ctx, user: discord.Member, *, reason = None):
if not reason:
await user.kick()
await ctx.send(f"**{user}** has been kicked for **no reason**.")
else:
await user.kick(reason=reason)
await ctx.send(f"**{user}** has been kicked for **{reason}**.")
慕容708150
TA貢獻1831條經驗 獲得超4個贊
很簡單，只需寫：
@client.command()
@commands.has_permissions(kick_members=True)
async def kick(self, ctx, user: discord.Member, *, reason=None):
await user.kick(reason=reason)
await ctx.send(f'{user.mention} has been kicked for {reason}!')
江戶川亂折騰
TA貢獻1851條經驗 獲得超5個贊
您收到該錯誤是因為您的函數如下所示：
async def kick(ctx, user: discord.Member, *, reason: str):
Reason 在這里不是可選的，因此它是一個required argument. 這意味著在沒有該參數的情況下調用此函數將導致錯誤。添加默認值使其成為可選。
def function(requiredArgument, optionalArgument=defaultValue)
在這種情況下，defaultValue應該是None. 現在，當您不為該參數傳遞任何內容時，將使用它的默認值。這樣，您就不再需要添加理由。
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