Discord.py connect to voice channel code example

Example 1: how to send a message in a specific channel discord.py

channel = client.get_channel(12324234183172)
await channel.send('hello')

Example 2: python discord bot join voice channel

@bot.command()
async def join(ctx):
    channel = ctx.author.voice.channel
    await channel.connect()
@bot.command()
async def leave(ctx):
    await ctx.voice_client.disconnect()

Example 3: discordpy how to make the bot join voice channel

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