laconicd-deprecated/tests/integration_tests/utils.py

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import socket
import time
def wait_for_port(port, host="127.0.0.1", timeout=40.0):
start_time = time.perf_counter()
while True:
try:
with socket.create_connection((host, port), timeout=timeout):
break
except OSError as ex:
time.sleep(0.1)
if time.perf_counter() - start_time >= timeout:
raise TimeoutError(
"Waited too long for the port {} on host {} to start accepting "
"connections.".format(port, host)
) from ex