There's a Windows answer, and a Debian answer, so here's a Mac one:

This assumes you're just here looking for a quick way to make a customisable alert sound, and not specifically the piezeoelectric beep you get on Windows:

os.system( "say beep" )

Disclaimer: You can replace os.system with a call to the subprocess module if you're worried about someone hacking on your beep code.

See: How to make the hardware beep sound in Mac OS X 10.6

I found this library to be helpful: Install beepy,

pip install beepy

There are 6 different sound options, you can see details here: https://pypi.org/project/beepy/

Code snip to listen to all the sounds:

import beepy as beep
for ii in range(1,7): 
    beep.beep(ii)

Using pygame on any platform

The advantage of using pygame is that it can be made to work on any OS platform. Below example code is for GNU/Linux though.

First install the pygame module for python3 as explained in detail here.

$ sudo pip3 install pygame

The pygame module can play .wav and .ogg files from any file location. Here is an example:

#!/usr/bin/env python3
import pygame
pygame.mixer.init()
sound = pygame.mixer.Sound('/usr/share/sounds/freedesktop/stereo/phone-incoming-call.oga')
sound.play()

On linux: print('\007') will make the system bell sound.

If you want beep from Zelda or Mario theme :

!pip install chime
import chime
chime.theme('zelda')

chime.success()
chime.warning()
chime.error()
chime.info()
chime.notify_exceptions()

1/0

# playsound in cross plate form, just install it with pip
#  first install playsound > pip install playsound
from playsound import playsound
playsound('audio.mp3')