NoneType object has no attribute id [closed]

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It should take the role ID next to the server ID in Json and define it as a silent role, but it gives an error and I don't know what the error is. Please help me

discord.ext.commands.errors.CommandInvokeError: Command raised an exception: AttributeError: 'NoneType' object has no attribute 'id'

def test1(guild_id: str):
        with open('test.json', "r") as f:
            test = json.load(f)
        return test[guild_id]

    @client.command()
    async def test(ctx):
        with open('test.json', 'r') as f:
            test = json.load(f)
            test1 = test[str(ctx.guild.id)]

            await ctx.send(f"{test1}")

    @client.command()
    async def mute(ctx, member: discord.Member, reason: str = "None"):    
      with open('test.json', 'r') as f:
        test = json.load(f)
        test1 = test[str(ctx.guild.id)]

        muted_role = discord.utils.get(ctx.guild.roles, id=test1)
        await member.add_roles(muted_role, reason = reason)

回答1:

You can use an if statement, e.g.if muted_role is not None

Hope this helps.

来源：https://stackoverflow.com/questions/62396279/nonetype-object-has-no-attribute-id