twisted.py

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.


"""
An example client. Run simpleserv.py first before running this.
"""
from __future__ import print_function
from time import sleep

from twisted.internet import reactor, protocol


# a client protocol

class EchoClient(protocol.Protocol):
    """Once connected, send a message, then print the result."""

    def connectionMade(self):
        print("Connection done")
        sleep(2)

    def dataReceived(self, data):
        "As soon as any data is received, write it back."
        print("Server said:", data)

    def connectionLost(self, reason):
        print("connection lost")

class EchoFactory(protocol.ClientFactory):
    protocol = EchoClient

    def clientConnectionFailed(self, connector, reason):
        print("Connection failed - goodbye!")
        reactor.stop()

    def clientConnectionLost(self, connector, reason):
        print("Connection lost - goodbye!")
        reactor.stop()


# this connects the protocol to a server running on port 8000
def main():
    f = EchoFactory()
    reactor.connectTCP("localhost", 6379, f)
    reactor.run()

# this only runs if the module was *not* imported
if __name__ == '__main__':
    main()

Twisted test, output

$ python simpleclient.py
Connection done
Server said: b'-ERR max number of clients reached\r\n'
connection lost
Connection lost - goodbye!

The data from buffer is consumed even the RST already came into the system.