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✏️ Editing: process_twisted.py

"""A process that reads from stdin and out using Twisted."""

# Twisted Preamble
# This makes sure that users don't have to set up their environment
# specially in order to run these programs from bin/.
import os
import sys

pos = os.path.abspath(sys.argv[0]).find(os.sep + "Twisted")
if pos != -1:
    sys.path.insert(0, os.path.abspath(sys.argv[0])[: pos + 8])
sys.path.insert(0, os.curdir)
# end of preamble

from zope.interface import implementer

from twisted.internet import interfaces
from twisted.python import log

log.startLogging(sys.stderr)

from twisted.internet import protocol, reactor, stdio

@implementer(interfaces.IHalfCloseableProtocol)
class Echo(protocol.Protocol):
    def connectionMade(self):
        print("connection made")

def dataReceived(self, data):
        self.transport.write(data)

def readConnectionLost(self):
        print("readConnectionLost")
        self.transport.loseConnection()

def writeConnectionLost(self):
        print("writeConnectionLost")

def connectionLost(self, reason):
        print("connectionLost", reason)
        reactor.stop()

stdio.StandardIO(Echo())
reactor.run()  # type: ignore[attr-defined]

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