import time
import threading
import random
import os
import sys

NTHREAD = 100

class MyThread(threading.Thread):
    def run(self):
        seconds = random.randint(0, 999) / 1000
        # Call PyEval_SaveThread() to release the GIL
        time.sleep(seconds)
        # Call PyEval_RestoreThread() to acquire the GIL

print(f"Start {NTHREAD} daemon threads", flush=True)

threads = [MyThread(daemon=True) for _ in range(NTHREAD)]
for thread in threads:
    thread.start()

# Wait 10 ms until threads started
time.sleep(0.1)

print("Exit Python main thread", flush=True)

# exit the main thread:
# Py_Finalize() destroys the interpreter and thread states