Stop bot from creating duplicate channel with same name | discord.py

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I am creating ticket tool for my discord bot but a user can create unlimited tickets by reacting there. However, I want the bot to dm that user to remind them that he is already having an open ticket.

This is what I have tried so far but it didn't work at all:

guild = await bot.fetch_guild(id)
channels = guild.text_channels
duplicate = False
name = f"{payload.member.name}'s ticket"
for channel in channels:
    if name == channel.name:
        duplicate = True
        break

if duplicate:
    await payload.member.send("You already have an open ticket")
    return
else:
    await category.create_text_channel(name, topic= topic, permission_synced= True)
    await ticket_channel.set_permissions(payload.member, read_messages= True, send_messages= True)
discord.py discord python
1 Answers

Text channels cannot have spaces nor quotation marks in their names (it will also be converted to lowercase), a name like this Name's ticket will be converted to names-tickets.

name = f"{payload.member.name.lower()}s-ticket"
for channel in channels:
    if name == channel.name:
        duplicate = True
        break

You can also simplify the code a lot, instead of having the for-loop you can use the any function

duplicate = any(name == channel.name for channel in channels)
if duplicate:
    return await payload.member.send("You already have an open ticket")
user_131310470
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