CODE EXAMPLE FOR PYTHON

unban discord.py

@client.command()
@commands.has_permissions(ban_members=True)
async def unban(ctx, *, member):
    banned_users = await ctx.guild.bans()
    member_name, member_discriminator = member.split('#')
    for ban_entry in banned_users:
        user = ban_entry.user

        if (user.name, user.discriminator) == (member_name,
                                               member_discriminator):
            await ctx.guild.unban(user)
            await ctx.send(f'Unbanned {user.mention}')
            return