disnake机器人编码错误：无法处理饥荒联机版表情致on_ready中断

问题背景 #

我开发了一个基于disnake的Discord机器人，负责同步饥荒联机版（Don't Starve Together）的服务器日志与聊天内容。当聊天日志中出现饥荒特殊表情󰀏时，会触发UnicodeEncodeError，导致on_ready函数停止运行，但机器人仍保持在线状态。需要忽略该特殊字符，让on_ready函数恢复正常工作。

相关代码 #

import disnake
from disnake.ext import commands
import re
import asyncio

from disnake import Intents
bot = commands.Bot(command_prefix="*", intents=disnake.Intents.all())

player_ku = {}

isConsole = False
isChat = True
isId = True

@bot.event
async def on_ready():
    print(f'{bot.user.name} has connected to Discord!')
    channel1 = bot.get_channel(1105450189688414208)  
    channel2 = bot.get_channel(1105450335947989042)  
    channel3 = bot.get_channel(1105694581800042566)
    last_line_file1 = ''
    last_line_file2 = ''
    while True:
        console_disabled_message_sended = False
        if isConsole:
            with open("server_log.txt", 'r', encoding='cp1251', errors='ignore') as file1: # Пусть к выводу консольи
                last_line = file1.readlines()[-1].strip() 
                last_line_utf82 = last_line.encode('cp1251', errors='backslashreplace').decode("utf8",errors='ignore')
                if last_line_utf82 != last_line_file1:
                    await channel1.send(f'```\n{last_line}\n```')
                    last_line_file1 = last_line_utf82 
                    asyncio.sleep(1)
        
        if isChat:
            with open('server_chat_log.txt', 'r', encoding="cp1251", errors='ignore') as file2: # Пусть к выводу чата
                last_line = file2.readlines()[-1].strip()  
                last_line_utf8 = last_line.encode('cp1251', errors='backslashreplace').decode("utf8",errors='ignore')
                if last_line_utf8 != last_line_file2:
                    cleaned_message = last_line_utf8.split("]: ")[1].split()
                    clean_message = " ".join(cleaned_message)
                    mega_cleaned_message = re.sub('[:(\)\\[\\]]', '', clean_message).split()
                    ku = mega_cleaned_message[1]
                    nick = mega_cleaned_message[2] 

                    if cleaned_message[0] == "[Say]":
                        await channel2.send(f"```\n💬 {clean_message}```")
                        last_line_file2 = last_line_utf8
                        if not ku in player_ku:
                            player_ku[ku] = nick
                            print(player_ku)
                            with open("savedKu.txt", "a") as file:
                                for key in player_ku:
                                    encoded_key = key.encode('cp1251', errors='backslashreplace').decode('utf-8', errors='ignore')
                                    file.write(f"\n{encoded_key}: {player_ku[key]}\n")
                                    if isId:
                                        await channel3.send(f"```\n🆔{encoded_key} = {player_ku[key]}```")

                    elif cleaned_message[0] == "[Whisper]":
                        await channel2.send(f"```\n🤫 {clean_message}```")
                        last_line_file2 = last_line_utf8
                        if not ku in player_ku:
                            print(player_ku)
                    elif cleaned_message[0] == "[Leave":
                        await channel2.send(f"```\n⬅️ {clean_message}```")
                        last_line_file2 = last_line_utf8
                    elif cleaned_message[0] == "[Join":
                        await channel2.send(f"```\n➡️ {clean_message}```")
                        last_line_file2 = last_line_utf8
                    elif cleaned_message[0] == "[Announcement]":
                        await channel2.send(f"```\n📢 {clean_message}```")
                        last_line_file2 = last_line_utf8
                    elif cleaned_message[0] == "[Death":
                        await channel2.send(f"```\n☠️ {clean_message}```")
                        last_line_file2 = last_line_utf8
                    else:
                        await channel2.send(f"```\n⬛️ {clean_message}```")
                        last_line_file2 = last_line_utf8

bot.run('---')

报错信息 #

Ignoring exception in on_ready Traceback (most recent
call last): File "C:\Users\N.Sarychev\Desktop\WTFbotControl\bot.py",
line 66, in on_ready file.write(f"\n{encoded_key}:
{player_ku[key]}\n") File "C:\Program
Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.3056.0_x64__qbz5n2kfra8p0\lib\encodings\cp1251.py",
line 19, in encode return
codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character
'\U000f000f' in position 15: character maps to

特殊字符示例：󰀏（饥荒联机版内置表情）
触发报错的字符串示例：[02:41:27]: [Say] (KU_nAt72Ax2) 󰀏трэш󰀏:

问题根源 #

报错出现在写入savedKu.txt文件时：默认打开文件未指定编码，系统使用了cp1251编码，但饥荒的特殊表情󰀏不在cp1251的字符范围内，导致编码失败，进而中断on_ready函数的循环。

解决方案 #

1. 修改文件写入的编码设置 #

将写入savedKu.txt的代码改为UTF-8编码，并添加errors='ignore'忽略无法编码的字符：

修改前：

with open("savedKu.txt", "a") as file:
    for key in player_ku:
        encoded_key = key.encode('cp1251', errors='backslashreplace').decode('utf-8', errors='ignore')
        file.write(f"\n{encoded_key}: {player_ku[key]}\n")

修改后：

# 指定UTF-8编码打开文件，忽略无法编码的特殊字符
with open("savedKu.txt", "a", encoding='utf-8', errors='ignore') as file:
    for key in player_ku:
        # 直接写入处理后的字符串，无需多余的编码转换
        file.write(f"\n{key}: {player_ku[key]}\n")

2. 优化编码转换逻辑 #

读取日志时已经将内容转换为UTF-8字符串，后续无需再用cp1251编码转换，直接使用处理后的字符串即可避免编码混乱。

额外建议 #

• 所有涉及文件读写的操作统一使用UTF-8编码，避免因编码不一致引发的问题。
• 若需要保留特殊字符的占位符，可将errors='ignore'替换为errors='backslashreplace'，将无法编码的字符转为转义序列保存。

内容的提问来源于stack exchange，提问作者Fanky