为什么 Guild.get_channel 有时会在 discord.py 中返回一个 none 对象

Question

所以我得到了这段代码，但是 get_channel 通常 returns 一个 none 对象，但有时它会回复不和谐频道对象。为什么会这样？有没有更好的办法？该脚本用于在频道中显示服务器的统计信息。

#Checking the channels & Server Stats
@bot.event
async def on_connect():

    while True:
        #Checking the channels
        filename = "/home/pi/discordbot/CCreated.json"
        with open('/home/pi/discordbot/CCreated.json', 'r') as f:
            channels_created = json.load(f)
                
        for content in channels_created['timers']:
            # find raiding
            Guild = bot.get_guild(771495836701425725)
            channel_id = int(content)

            # finds the members ([] when noone is in)
            voice_channel = bot.get_channel(channel_id)
            voice_ch_str = str(voice_channel.members)
            #Testing if someone is in there
            if voice_ch_str == "[]":
                channel_get = bot.get_channel(channel_id)
                await channel_get.delete()

                with open("/home/pi/discordbot/CCreated.json", "r") as f:
                    data = json.load(f)

                    data["timers"].pop(f"{data['timers'][content]['channel_id']}")

                with open("/home/pi/discordbot/CCreated.json", "w") as f:
                    json.dump(data, f, indent=2)

#Server Stats

#Getting User Count
Guild = bot.get_guild(771495836701425725)
member_count = len(Guild.members)  # includes bots
true_member_count = len([m for m in Guild.members if not m.bot])  # doesn't include bots

#Getting Streamer Count
role = Guild.get_role(841596562689097729)
#print(type(role))
#print(len(role.members))
streamer_count = len(role.members)

#Setting the new Stats
streamer_stats = Guild.get_channel(968570363103568012)
await streamer_stats.edit(name=f"\U0001F4CA STREAMER: {streamer_count}")

Answer 1

get 和 Client class 中定义的 fetch 方法之间存在一个关键区别。区别在于：get returns cached 机器人结果，而 fetch returns API 调用，又名请求，提供有关所请求项目的全局信息。

这有一些缺点。

使用 fetch 通常 returns objects/instances 使用的属性少得多，因为全局信息不如缓存信息那么多，缓存信息本质上是机器人本身可以看到的项目。简而言之：

Client.get_channel(some_id) # returns a cached channel, has all the documented attributes

# not the same as below
await Client.fetch_channel(some_id) # returns a channel fetched directly from the API, does lack a few of the documented attributes

Answer 2

我修好了。我将角色检查放在成员更新中并针对特定角色进行“过滤”，每当有人获得或丢失它时，它都会检查该角色拥有多少用户，然后设置频道名称。

用户计数现在在 on_member_remove /join 中，每次发生这种情况时，机器人都会检查服务器上有多少用户并设置频道名称。

为什么 Guild.get_channel 有时会在 discord.py 中返回一个 none 对象

Why is Guild.get_channel returning a none object sometimes in discord.py

python

discord

discord.py