headless pygame (without a window) playing two sounds at different times.

play_audio_layer.py

""" headless pygame (without a window) playing two sounds one after the other.
"""

import os, sys, time
import pygame
import pygame.examples

# a pretend video.
os.environ["SDL_VIDEODRIVER"] = "dummy"

def pygame_example_data(fname):
    return os.path.join(os.path.split(pygame.examples.__file__)[0], "data", fname)

file1 = pygame_example_data("boom.wav")
file2 = pygame_example_data("car_door.wav")
when_sound1 = 0.5
when_sound2 = 2.5

clock = pygame.time.Clock()

pygame.init()
screen = pygame.display.set_mode((1,1))
sound1 = pygame.mixer.Sound(file1)
sound2 = pygame.mixer.Sound(file2)
second_played = 0

FIRST = pygame.event.custom_type()
SECOND = pygame.event.custom_type()

# https://www.pygame.org/docs/ref/time.html#pygame.time.set_timer
# play things once...
pygame.time.set_timer(FIRST, int(when_sound1 * 1000), 1)
pygame.time.set_timer(SECOND, int(when_sound2 * 1000), 1)


going = True
while going:
    for event in pygame.event.get():
        if event.type == FIRST:
            sound1.play()
        if event.type == SECOND:
            second_played = sound2.play()

    if second_played and not second_played.get_busy():
        going = False

    # without this there is "Fatal Python error: PyEval_SaveThread: NULL tstate\nAbort trap: 6"
    clock.tick(60)

# without this and second_played.get_busy() above there is a segfault.
time.sleep(1)