Discord Python error: AttributeError: 'TextChannel' object has no attribute 'create_thread' - discord

Question

I've got a series of lengthy messages that make up the help function of my Discord bot, and I'd like to have them sent to a thread instead of the channel itself. However, when I try and call create_thread(), I get this error: AttributeError: 'TextChannel' object has no attribute 'create_thread'
Here's my code:
import discord
import os
import random
import time
client = discord.Client()
class initiative_card:
def __init__(self,name,command,image,emoji,color,card_type,copy,user_defined_name):
self.rgb = str(color).split(",")
self.raw_color = color
self.name = name
self.command = command
self.image = image
self.emoji = emoji
self.color = discord.Color.from_rgb(int(self.rgb[0]),int(self.rgb[1]),int(self.rgb[2]))
if (card_type == "Hero"):
self.is_hero = True
else:
self.is_hero = False
self.copy = copy
self.user_defined_name = user_defined_name
self.faceup = True
self.cardback_emoji = "<:initcardback:1069116117756432435>"
self.cardback_image = "https://cdn.discordapp.com/emojis/1069116117756432435.webp?size=96&quality=lossless"
def flip(self):
self.faceup = not self.faceup
global all_initiative_cards
global initiative_deck
global turn_index
def initialize_deck():
global all_initiative_cards
global initiative_deck
global turn_index
all_initiative_cards = []
# Read the cards file and create the initiative deck
with open('initiative_cards.txt') as f:
lines = f.readlines()
print('Found ' + str(len(lines)) + ' card entries in file')
valid_lines = 0
hero_card_count = 0
for i in lines:
words = i.split(" ")
if len(words) == 7:
all_initiative_cards.append(initiative_card(words[0],words[1],words[2],words[3],words[4],words[5],0,"undefined"))
valid_lines = valid_lines + 1
for i in all_initiative_cards:
if i.is_hero:
hero_card_count = hero_card_count + 1
print(str(valid_lines) + " valid entries found; created " + str(len(all_initiative_cards)) + " cards, of which " + str(hero_card_count) + " were hero cards.")
initiative_deck = []
turn_index = 0
return
#client.event
async def on_ready():
initialize_deck()
await client.change_presence(activity=discord.Activity(type=discord.ActivityType.listening, name='!inithelp'))
#client.event
async def on_message(message):
global all_initiative_cards
global initiative_deck
global turn_index
if message.author == client.user:
return
if message.content.startswith('!allcards'):
new_thread = await message.channel.create_thread(name="Initiative Card Reference", message="Initiative Card Reference", type=ChannelType.public_thread)
new_thread.add_user(message.author)
embed=discord.Embed(title="Initiative", description="Listing all cards available to add to the track.", color=0x8c8c8c)
embed.set_thumbnail(url='https://cdn.discordapp.com/emojis/756583300612751460.webp?size=96&quality=lossless')
for index, item in enumerate(all_initiative_cards):
if (not (index % 8)) and (index > 0):
await new_thread.send(embed=embed)
embed=discord.Embed(title="Spectaculars Initiative", description="Listing all cards available to add to the track.", color=0x8c8c8c)
embed.set_thumbnail(url='https://cdn.discordapp.com/emojis/756583300612751460.webp?size=96&quality=lossless')
embed.add_field(name=item.name, value="Card ID: " + item.command, inline=True)
embed.add_field(name="Card Image", value=item.emoji,inline=True)
embed.add_field(name='\n',value='\n')
await new_thread.send(embed=embed)
Discord.py seems to have a create_thread method for TextChannel. What am I not seeing here?
I've tried removing all of the arguments from message.channel.create_thread. I was expecting this to create a new thread with the help text in it in the channel in which the help request was sent.