time.sleep gevent.sleep test

test.py

import threading
import time
import gevent


def hi1():
    time.sleep(3) # release GIL
    print('hi1')


def hi2():
    def hi3():
        gevent.sleep(1)
        print('hi3')
    gevent.spawn(hi3)
    gevent.sleep(5) # should not release GIL?
    print('hi2')


threading.Thread(target=hi1).start()
threading.Thread(target=hi2).start()

# prints:
# hi3
# hi1   <-- should it print?
# hi2

# gevent: 1.4.0
# python: 2.7, 3.7