Can I use gevent's sleep in eventlet to avoid blocking?

no!

 from loguru import logger
import gevent
# from gevent import monkey
# monkey.patch_all()

import eventlet
eventlet.monkey_patch()


def foo(i):
    gevent.sleep(1)


pool = eventlet.GreenPool()
for body in pool.imap(foo, [i for i in range(2)]):
    print("got body", body)

operation result:

 ╰─➤  time python eventlet_with_gevent_sleep.py 
got body None
got body None
python eventlet_with_gevent_sleep.py  0.39s user 0.05s system 17% cpu 2.515 total

As you can see, it took more than 2 seconds in total

---

 from loguru import logger
import gevent
# from gevent import monkey
# monkey.patch_all()

import eventlet
eventlet.monkey_patch()


def foo(i):
    eventlet.sleep(1)


pool = eventlet.GreenPool()
for body in pool.imap(foo, [i for i in range(2)]):
    print("got body", body)

operation result:

 ─➤  time python eventlet_with_gevent_sleep.py
got body None
got body None
python eventlet_with_gevent_sleep.py  0.41s user 0.05s system 29% cpu 1.594 total

Using eventlet becomes normal