how to make a bot say hello when a user says hello in discord with python

@client.command()
async def hello(ctx):
    await ctx.send(f"hello, {ctx.author.name}")

Here is what the above code is Doing:
1. We’re creating a command called “hello”
2. When the command is called, it sends a message to the channel it was called in
3. The message says “hello, {author.name}”
4. The {author.name} part is replaced with the name of the person who called the command

Now, let’s add a command that will play a sound when called.

@client.command()
async def play(ctx):
await ctx.send(“Playing a sound!”)
await ctx.voice_client.play(discord.FFmpegPCMAudio(‘sound.mp3’))

The above code will play a sound called “sound.mp3” when the command is called.

Now, let’s add a command that will stop the sound.

@client.command()
async def stop(ctx):
await ctx.voice_client.disconnect()

The above code will stop the sound when the command is called.

Now, let’s add a command that will join a voice channel.

@client.command()
async def join(ctx):
await ctx.voice_client.connect(ctx.author.voice.channel)

The above code will join the voice channel that the person who called the command is in.

Now, let’s add a command that will leave the voice channel.

@client.command()
async def leave(ctx):
await ctx.voice_client.disconnect()

The above code will leave the voice channel when the command is called.

Now, let’s add a command that will play a YouTube video.

@client.command()
async def play_youtube(ctx, url):
await ctx.send(“Playing a YouTube video!”)
await ctx.voice_client.play(discord.FFmpegPCMAudio(url))

The above code will play a YouTube video when the command is called. The video will be played from the URL that is provided.

Now, let’s add a command that will play a Spotify song.

@client.command()
async def play_spotify(ctx, url):
await ctx.send(“Playing a Spotify song!”)
await ctx.voice_client.play(discord.FFmpegPCMAudio(url))

The above code will play a Spotify song when the command is called. The song will be played from the URL that is provided.

Now, let’s add a command that will play a SoundCloud song.

@client.command()
async def play_soundcloud(ctx, url):
await ctx.send(“Playing a SoundCloud song!”)
await ctx.voice_client.play(discord.FFmpegPCMAudio(url))

The above code will play a SoundCloud song when the command is called. The song will be played from the URL that is provided.

Now, let’s add a command that will play an audio file from a URL.

@client.command()
async def play_audio(ctx, url):
await ctx.send(“Playing an audio file!”)
await ctx.voice_client.play(discord.FFmpegPCMAudio(url))

The above code will play an audio file when the command is called. The file will be played from the URL that is provided.

Now, let’s add a command that will pause the audio.

@client.command()
async def pause(ctx):
await ctx.voice_client.pause()

The above code will pause the audio when the command is called.

Now, let’s add a command that will resume the audio.

@client.command()
async def resume(ctx):
await ctx.voice_client.resume()

The above code will resume the audio when the command is called.

Now, let’s add a command that will skip the audio.

@client.command()
async def skip(ctx):
await ctx.voice_client.stop()

The above code will skip the audio when the command is called.

Now, let’s add a command that will play a random audio file from a directory.

@client.command()
async def play_random(ctx):
await ctx.send(“Playing a random audio file!”)
await ctx.voice_client.play(discord.