Scapy AsyncSniffer fails if stop() is called right after start() - asynchronous

Question

Look at the following example
a = AsyncSniffer()
a.start()
a.stop()
a.stop() will throw an exception. Is there a way to fix this without adding a time.sleep() between the start() and stop()?
this ofcourse is a contrived example but the code in our project has the same problem if I create a test stub in between the start() and the stop()
Update:
tracebak from pycharm run:
FAILED [100%]
test_async_sniffer.py:3 (test_async_sniffer)
self = <scapy.sendrecv.AsyncSniffer object at 0x7f1d57a7f1f0>, join = True
def stop(self, join=True):
"""Stops AsyncSniffer if not in async mode"""
if self.running:
try:
> self.stop_cb()
E AttributeError: 'AsyncSniffer' object has no attribute 'stop_cb'
venv/lib/python3.8/site-packages/scapy/sendrecv.py:1017: AttributeError
During handling of the above exception, another exception occurred:
def test_async_sniffer():
a = AsyncSniffer()
a.start()
> a.stop()
test_async_sniffer.py:7:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <scapy.sendrecv.AsyncSniffer object at 0x7f1d57a7f1f0>, join = True
def stop(self, join=True):
"""Stops AsyncSniffer if not in async mode"""
if self.running:
try:
self.stop_cb()
except AttributeError:
> raise Scapy_Exception(
"Unsupported (offline or unsupported socket)"
)
E scapy.error.Scapy_Exception: Unsupported (offline or unsupported socket)
venv/lib/python3.8/site-packages/scapy/sendrecv.py:1019: Scapy_Exception

Answer 1

A possible answer although not pretty:
a = AsyncSniffer()
a.start()
if not hasattr(a, 'stop_cb'):
time.sleep(0.06)
a.stop()
seems the start() creates the attribute stop_cb, and if stop() is called right after start() the stop_cb has not been created yet, so I add an hasattr with a sleep (testing shows 0.06 secs is sufficient time but I guess it's very arbitrary)