How to make the bot react to a message in the chat?

Question

Python

I make a chat bot
Type when a newcomer writes in the chat hello bot answered

Answer 1

@bot.event
async def on_message(message):
    if "привет" in str(message).lower():
        await message.channel.send("Привет, друг")

Or use this method if the previous one didn't work:

@bot.event
async def on_message(message):
    if "привет" in str(message.content).lower():
        await message.channel.send("Привет, друг")

Answer 2

This should be message.content
the code

@bot.event
async def on_message(message):
    if "привет" in str(message.content).lower():
        await message.channel.send("Привет, друг")

After that, I got a bug that re-answers also to previous messages, in order to fix it, you need to remove it .lover()and everything will work well
here is the code without.lover()

@bot.event
async def on_message(message):
    if "привет" in str(message.content):
        await message.channel.send("Привет, друг")