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    <p>Replace <code>reactor.spawnProcess(proto, addr)</code> with <code>reactor.spawnProcess(proto, addr, ['maze'], {})</code>.</p> <p>Past experience has show that if you don't pass exe name as the first argument then nothing useful happens. However I have yet to find a reasonable explanation for why this happens.</p> <p>Also you don't need <code>global reactor</code>. When you import the <code>reactor</code> you add it to the top level script namespace. This means that all functions and class in the same file can use it without declaring a global or importing again.</p> <p>Also, you should not be using <code>sleep(0.01)</code> because:</p> <ol> <li>Its not a builtin function. You need to import it from the <code>time</code> <a href="http://docs.python.org/library/time.html#time.sleep" rel="nofollow">module</a>.</li> <li>Twisted is a asynchronous framework where function should avoid blocking at all costs, and <code>time.sleep()</code> (<a href="http://docs.python.org/library/time.html#time.sleep" rel="nofollow">link</a>) by its definition is a blocking call.</li> </ol> <p>You should instead use <code>reactor.callLater()</code> <a href="http://twistedmatrix.com/documents/current/api/twisted.internet.interfaces.IReactorTime.html#callLater" rel="nofollow">link</a> where you provide it will a callback and a time period. This will let twisted handle other things (like a new connection) while you wait.</p> <p>Finally, you code at the moment would require the user to enter input before the program asks for any. This is because <code>getWrit</code> just sends stuff already in the buffer rather than asking the user. This means that if the user hasn't sent any data before <code>getWrit</code> is called then it will just return an empty string.</p> <p>It would be a better idea if you used a deferred. Then what you would do is call <code>getWrit</code> which would immanently return a deferred and clear the data buffer. Then in <code>dataReceived</code> you would append data to the buffer until you got a newline character (<code>\n</code>). At which point you would call the deferred set up in <code>getWrit</code>.</p> <p>Something like this:</p> <pre><code>print 'Preall test works!' from twisted.internet import reactor, protocol, defer from twisted.python import log import sys print 'Imports done' class PrgShell(protocol.Protocol): data = '' class PrgProto(protocol.ProcessProtocol): def __init__(self, out): print 'Prgproto instance made' self.transportout = out.transport self.out = out def outReceived(self, data): """Called when process sends data. We send it on to transport, however if it's 'I want input', we need to activate input.""" print 'Sub said: '+data if data == "input": print 'Sub wants input' self.transportout.write("input") d = self.out.getWrit() # getWrit returns a deferred. We store it in d to make the code more readable d.addCallback(self.sendInput) # Here we add self.sendInput to the callback chain. # This way self.sendInput gets called with the user input. else: self.transportout.write(data) def sendInput(self, data): self.transport.write(data) def getWrit(self): print 'Proto gave input to prg' self.deferred = defer.deferred() self.data = '' return self.deferred def connectionMade(self): print 'Connected' proto = self.PrgProto(self) addr = "C:\\Documents and Settings\\papa\\My Documents\\Python\\Files\\Maze\\exe\\maze.exe" reactor.spawnProcess(proto, addr, ['maze'], {}) print 'Procces spawned!' def dataReceived(self, data): print 'Data recived: '+data self.data+=data if self.data.endswith('\n'): if self.deferred: # We got a newline character, and there is a deferred to call, so lets call it d, self.deferred = self.deferred, None # This will set self.deferred to none to stop mistakes later d.callback(self.data) # Call the deferred with data. This will send the data to sendInput above. self.data = '' # Clear the buffer print 'About to do stuff' factory = protocol.ServerFactory() factory.protocol = PrgShell #f = open("errors.txt", 'w') #log.startLogging(f) #print 'Logging started' reactor.listenTCP(8000,factory) print 'Runing' reactor.run() </code></pre>
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