Minor - P4 We don't currently test eventlet with Python 3.10, and we shouldn't because they are incompatible:
https://github.com/eventlet/eventlet/issues/687
Sadly, importing eventlet has the side effect of monkey patching python:
https://github.com/eventlet/eventlet/issues/701
This causes problems with a utility helper in our test suite that tests if python is monkey patched by eventlet:
[2021/09/22 22:02:24.188] ======================================================================
[2021/09/22 22:02:24.188] ERROR [0.807s]: test_interrupt_signal (test_client.TestClient)
[2021/09/22 22:02:24.188] ----------------------------------------------------------------------
[2021/09/22 22:02:24.188] Traceback (most recent call last):
[2021/09/22 22:02:24.188] File "/data/mci/a11c848602f16b259e12b3f7342ff15f/src/test/test_client.py", line 1148, in test_interrupt_signal
[2021/09/22 22:02:24.188] if is_greenthread_patched():
[2021/09/22 22:02:24.188] File "/data/mci/a11c848602f16b259e12b3f7342ff15f/src/test/utils.py", line 926, in is_greenthread_patched
[2021/09/22 22:02:24.188] return gevent_monkey_patched() or eventlet_monkey_patched()
[2021/09/22 22:02:24.188] File "/data/mci/a11c848602f16b259e12b3f7342ff15f/src/test/utils.py", line 918, in eventlet_monkey_patched
[2021/09/22 22:02:24.188] import eventlet
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/__init__.py", line 17, in <module>
[2021/09/22 22:02:24.188] from eventlet import convenience
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/convenience.py", line 7, in <module>
[2021/09/22 22:02:24.188] from eventlet.green import socket
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/green/socket.py", line 4, in <module>
[2021/09/22 22:02:24.188] __import__('eventlet.green._socket_nodns')
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/green/_socket_nodns.py", line 11, in <module>
[2021/09/22 22:02:24.188] from eventlet import greenio
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/greenio/__init__.py", line 3, in <module>
[2021/09/22 22:02:24.188] from eventlet.greenio.base import * # noqa
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/greenio/base.py", line 32, in <module>
[2021/09/22 22:02:24.188] socket_timeout = eventlet.timeout.wrap_is_timeout(socket.timeout)
[2021/09/22 22:02:24.188] File "/opt/python/3.10/lib/python3.10/site-packages/eventlet/timeout.py", line 166, in wrap_is_timeout
[2021/09/22 22:02:24.188] base.is_timeout = property(lambda _: True)
[2021/09/22 22:02:24.188] TypeError: cannot set 'is_timeout' attribute of immutable type 'TimeoutError'
The import isn't actually necessary in this helper. Removing it should work around the bad behavior from eventlet.