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import threading
import os
import pty
def create_dummy_port(responses):
def listener(port):
# continuously listen to commands on the master device
while 1:
res = b''
while not res.endswith(b"\r"):
# keep reading one byte at a time until we have a full line
res += os.read(port, 1)
print("command: %s" % res)
# write back the response
if res in responses:
resp = responses[res]
del responses[res]
os.write(port, resp)
master, slave = pty.openpty()
thread = threading.Thread(target=listener, args=[master], daemon=True)
thread.start()
return os.ttyname(slave)
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