所以我试图制作一个踢命令，以便如果没有任何原因，那么它会说“没有原因”而不是“没有”。别问为什么。这是我的代码：@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}**.")这是错误：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.我不明白为什么它说“原因是缺少的必需参数”，因为我说如果原因是 None 它会说没有原因？
3 回答
胡说叔叔
TA贡献1804条经验 获得超8个赞
如果您分配None给reason，那么您可以检查它。例如reason = None。之后，您可以检查命令是否原因为None。这是代码：
@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贡献1831条经验 获得超4个赞
很简单，只需写：
@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}!')
江户川乱折腾
TA贡献1851条经验 获得超5个赞
您收到该错误是因为您的函数如下所示：
async def kick(ctx, user: discord.Member, *, reason: str):
Reason 在这里不是可选的，因此它是一个required argument. 这意味着在没有该参数的情况下调用此函数将导致错误。添加默认值使其成为可选。
def function(requiredArgument, optionalArgument=defaultValue)
在这种情况下，defaultValue应该是None. 现在，当您不为该参数传递任何内容时，将使用它的默认值。这样，您就不再需要添加理由。
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