Having problems with making a chat in python

Question

So basically I am trying to make a chat using python and I want to make a GUI for it using tkinter, I run the code and everything is normal everything except my GUI, it should be showing the name of the one who sends the message and the message itself but instead of that it's showing {self.name}:{self.msg} and here is the code:

def sendMessage(self):
        self.textCons.config(state=DISABLED)
        while True:
              message = "{self.name}: {self.msg}"
              client.send(message.encode(FORMAT))
              break

Answer 1

for the message you have to do:

message = "{0}: {1}".format(self.name, self.msg)

then in your while loop you do:

while True:
    #do something
    break

that iterate only one time, so if you whant only one repetition you have to do:

#do something

esle if you want to do it more times you can use a for x in range() loop or a while loop where you stop if a condition ocurres