変数を定義してるはずなのに

前提・実現したいこと

discord.pyでゲームを作ろうとしています。
機能を実装中に以下のエラーメッセージが発生しました。

発生している問題・エラーメッセージ

  File "bk.py", line 32, in match
    if p == 0:
UnboundLocalError: local variable 'p' referenced before assignment

The above exception was the direct cause of the following exception:

該当のソースコード

python
1import discord
2from discord.ext import commands
3import random
4prefix = commands.Bot(command_prefix='$')
5p = p1 = p2 = bet = stay = mere = bh1 = bh2 = room = 0
6turn = True
7hand1 = []
8hand2 = []
9limit = 3
10sum = 13
11card = [1,2,3,4,5,6,7]
12async def TURNEND():
13    if turn == True:
14        turn = False
15        await room.send(f'{p1.mention}turn')
16    else:
17        turn = True
18        await room.send(f'{p2.mention}turn')
19@prefix.event
20async def on_ready():
21    print('start')
22@prefix.command(aliases=['m'])
23async def match(ctx):
24    if p == 0:
25        room = ctx
26        p1 = room.author
27        await room.send(f'{p1.mention}owner')
28        p += 1
29    elif p == 1:
30        p2 = room.author
31        await room.send(f'{p2.mention}guest')
32        p += 1
33        await room.send('start')
34        bet += 1
35        bh1 = card.pop(random.randint(0,len(card) - 1))
36        bh2 = card.pop(random.randint(0,len(card) - 1))
37        hand1.append(card.pop(random.randint(0,len(card) - 1)))
38        hand2.append(card.pop(random.randint(0,len(card) - 1)))
39        await room.send(f'{p1.mention}turn')
40        await p1.dm_create().send(f'?={bh1}')
41        await p1.dm_create().send(f'?={bh2}')
42    else:
43        await ctx.send('error')