For creating a Twisted client, we can follow the same programming model we used for creating a server with Twisted. Basically, we need to define a protocol type, a factory, and a reactor.

To create clients with Twisted, we can use the TCP4ClientEndpoint class to establish a connection with the server. We will use the connectProtocol method and pass through the host and the port as parameters.

There are multiple classes and utilities to make connections to remote servers using Twisted. The use of such classes depends on the protocol that's used for communication with the server.

You can find the following code in the twisted_basic_client.py file:

#!/usr/bin/python3

from twisted.internet import reactor
from twisted.internet.protocol import Protocol
from twisted.internet.protocol import ClientFactory

class MyTwistedClient(Protocol):
 def connectionMade(self):
 self.transport.write('Connection established'.encode())

 def connectionLost(self, reason):
 print('Connection Lost %s ' %(reason))

 def dataReceived(self, data):
 print('Server data: ', data)
 self.transport.loseConnection()

In the previous code block, we defined our MyTwistedClient class that functions as protocol. In the following code block, we define the MyTwistedClientFactory class for managing the connection.

Finally, our main program that connects the protocol to a server running on port 8080 using the MyTwistedClientFactory()) class is as follows:

class MyTwistedClientFactory(ClientFactory):
 protocol = MyTwistedClient

 def clientConnectionFailed(self, connector, reason):
 print('Connection Failed')
 reactor.stop()

 def clientConnectionLost(self, connector, reason):
 print('Connection Lost')
 reactor.stop()

reactor.connectTCP('localhost', 8080, MyTwistedClientFactory())
reactor.run()

In this section, we have built our own Twisted client for communicating with a Twisted server on port 8080. In this case, we are creating a class called MyTwistedClient that acts as protocol, as well as a class called MyTwistedClientFactory, which manages connections between the client and server.