mute.py

@client.command(pass_context = True)
@commands.has_permissions(kick_members=True) 
async def mute(ctx, member: discord.Member=None, mutetime=None):
    if member is None:
        await client.say('Please specify member i.e. Mention a member to mute. Example-``mv!mute @user <time in minutes>``')
        return
    if mutetime is None:
        await client.say('Please specify time i.e. Mention a member to mute with time. Example-``mv!mute @user <time in minutes>``')
        return
    if member.server_permissions.kick_members:
        await client.say('**You cannot mute admin/moderator!**')
        return
    if ctx.message.author.bot:
      return
    else:
      mutetime =int(mutetime)
      mutetime = mutetime * 60
      output = mutetime/60
      role = discord.utils.get(member.server.roles, name='Muted')
      await client.add_roles(member, role)
      await client.say("Muted **{}**".format(member.name))
      await client.send_message(member, "You are muted by {0} for {1} Minutes".format(ctx.message.author, output))
      for channel in member.server.channels:
        if channel.name == '<log channel name>':
            embed=discord.Embed(title="User Muted!", description="**{0}** was muted by **{1}** for {2} minutes!".format(member, ctx.message.author, output), color=0x37F60A)
            await client.send_message(channel, embed=embed)
            await asyncio.sleep(mutetime)
            await client.remove_roles(member, role)
            await client.say("Unmuted **{}**".format(member.name))
            embed=discord.Embed(title="User unmuted!", description="**{0}** was unmuted!".format(member, ctx.message.author), color=0xFD1600)
            await client.send_message(channel, embed=embed)
            
@client.command(pass_context = True)
@commands.has_permissions(kick_members=True) 
async def unmute(ctx, member: discord.Member=None):
    if member is None:
      await client.say('Please specify member i.e. Mention a member to unmute. Example- ``mv!unmute @user``')
    if ctx.message.author.bot:
      return
    else:
      role = discord.utils.get(member.server.roles, name='Muted')
      await client.remove_roles(member, role)
      await client.say("Unmuted **{}**".format(member))
      for channel in member.server.channels:
        if channel.name == '<log channel name>':
            embed=discord.Embed(title="User unmuted!", description="**{0}** was unmuted by **{1}**!".format(member, ctx.message.author), color=0xFD1600)
            await client.send_message(channel, embed=embed)