由于单词中的附加字符，如何删除与黑名单不完全匹配的单词？

Question

我正在制作一个阻止脏话的 Discord 机器人。它可以通过使用下划线和/或附加到脏话的其他符号来绕过。

如何让脚本仍然阻止这些单词但一般不删除字符？

这是我的代码：

import discord
import random
import string
from discord.ext import commands

client = commands.Bot(command_prefix = 'as-')

with open("badwords2.txt") as file:
    bad_words = file.read().splitlines()

def check_if_allowed(text):

    allowed_characters = string.ascii_uppercase + string.ascii_lowercase 
    
    if character not in allowed_characters: 
        return False

    return True
    
@client.event
async def on_message(message):    
    for bad_word in bad_words:
        if bad_word in message.content.lower().split(" "):
            t = discord.Embed(color=0x039e00, title="Message Removed", description=":x:   Please do not swear. Swearing can result in a mute or ban.")
            t.set_footer(text="DM TheSuperRobert2498#2498 for bot suggestions.")
            await message.channel.send(embed=t)
            await message.delete()
            return

    if not check_if_allowed(message.content):
        t = discord.Embed(color=0x039e00, title="Message Removed", description=":x:  Please do not swear. Swearing can result in a mute or ban.")
        t.set_footer(text="DM TheSuperRobert2498#2498 for bot suggestions.")
        await message.channel.send(embed=t)
        await message.delete()
        return


client.run('TOKEN')

Answer 1

如果我的消息是“大家好，@#@@_badWord@@ 怎么了？” 那么，message.content.lower().split(" ") 就是 ["hey", "guys", "@#@@_badWord@@", "what's", "up?"]

因此，您可以对正在检查的此列表发挥创意。

也许会

[re.sub(r'\W+', ' ', word) for word in content.message.content.lower().split(" ")]

这将创建一个新列表（使用列表理解），其中每个单词都删除了特殊字符（使用 RegEx 替换）

见：How to remove special characters except space from a file in python?

我还建议把它做成一个函数，这样你就不必写两次代码了：

t = discord.Embed(color=0x039e00, title="Message Removed", description=":x:   Please do not swear. Swearing can result in a mute or ban.")
t.set_footer(text="DM TheSuperRobert2498#2498 for bot suggestions.")

Answer 2

您可以尝试使用re 模块中的re.sub() 函数从单词中删除所有特殊字符：

    clearMessage = re.sub('[^A-Za-z0-9]+', '', message.content))

并删除空格：

    clearMessage = clearMessage.replace(" ","")

如果你把它放在你的代码中，它看起来像这样：

import random
import string
import re
from discord.ext import commands

client = commands.Bot(command_prefix = 'as-')

with open("badwords2.txt") as file:
    bad_words = file.read().splitlines()

def check_if_allowed(text):

    allowed_characters = string.ascii_uppercase + string.ascii_lowercase #creates a string containing all upper- and lower- case letters.

    if character not in allowed_characters: #checks if the character is in the set of allowed characters, and returns false if not
        return False

    return True #returns true if every character in the input is allowed
    
@client.event
async def on_message(message):    
    clearMessage = re.sub('[^A-Za-z0-9]+', '', message.content))
    clearMessage = clearMessage.replace(" ","")

    for bad_word in bad_words:
        if bad_word in clearMessage:
            t = discord.Embed(color=0x039e00, title="Message Removed", description=":x:   Please do not swear. Swearing can result in a mute or ban.")
            t.set_footer(text="DM TheSuperRobert2498#2498 for bot suggestions.")
            await message.channel.send(embed=t)
            await message.delete()
            return

    if not check_if_allowed(message.content):
        t = discord.Embed(color=0x039e00, title="Message Removed", description=":x:  Please do not swear. Swearing can result in a mute or ban.")
        t.set_footer(text="DM TheSuperRobert2498#2498 for bot suggestions.")
        await message.channel.send(embed=t)
        await message.delete()
        return

您不一定需要将您的信息拆分为所有单词。 if something in something 语句还可以搜索原始字符串