Socket, AttributeError: 'str' object has no attribute 'send' - sockets

Question

If anyone actually reads this thanks!
Anyway on to the problem, every time I run my code I get an 'AttributeError' and I can't find where the issue is. I'm using Socket, tKinter, os and multiprocessing. Here's my code(I know its now the most pythony thing in the world but hey I'm just playing with sockets):
#---Import statments---#
import socket, os, multiprocessing
import tkinter as tk
#---global variables---#
setup = ''
cleintsocket = ''
#---Defs---#
def setup():
global host, port, user
host = setup_host_box.get()
port = setup_port_box.get()
user = setup_user_box.get()
def connect(self, hostname, connectingport):
self.connect((hostname, int(connectingport)))
print('connected')
multiprocessing.Process(target = resv()).start()
def create_sock(nhost, nport):
global cleintsocket
cleintsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
connect(cleintsocket, nhost, nport)
def send(username, cleintsock):
'''to send a message'''
usrmsg = (username + ' - ' + chat_msg_box.get()).encode()
cleintsock.send(usrmsg)
def resv(sock):
'''resive subscript, run through mutiprosses module'''
while True:
rmsg = sock.recv(1024).decode()
chat_msg_display_text.insert('end.0.', rmsg)
def chat():
'''loads chat page'''
setup_host_text.pack_forget()
setup_host_box.pack_forget()
setup_port_text.pack_forget()
setup_port_box.pack_forget()
setup_user_text.pack_forget()
setup_user_box.pack_forget()
setup_confirm_button.pack_forget()
chat_msg_desplay_text.pack()
chat_msg_box.pack()
chat_msg_send_button.pack()
def start():
'''starts the setup page'''
setup_host_text.pack()
setup_host_box.pack()
setup_port_text.pack()
setup_port_box.pack()
setup_user_text.pack()
setup_user_box.pack()
setup_confirm_button.pack()
#---TK Setup---#
#--window setup--#
window = tk.Tk()
window.title('Chat')
window.geometry('600x600')
window.configure(background='#ffffff')
#--connection setup page--#
setup_host_text = tk.Label(window, text = 'Host')
setup_host_box = tk.Entry(window, bg = '#ffffff')
setup_port_text = tk.Label(window, text = 'Port')
setup_port_box = tk.Entry(window, bg = '#ffffff')
setup_user_text = tk.Label(window, text = 'Username')
setup_user_box = tk.Entry(window, bg = '#ffffff')
setup_confirm_button = tk.Button(window,text = 'Connect', command = setup())
#--chat page--#
chat_msg_box = tk.Entry(window, bg='#ffffff')
chat_msg_send_button = tk.Button(window, text = 'send', command = send(user, cleintsocket))
chat_msg_display_text = tk.Text(window, width=600, height=500, wrap = 'word')
#--------------#
start()
The python console is saying there is an error here chat_msg_send_button = tk.Button(window, text = 'send', command = send(user, cleintsocket)) that produces an AttributeError: 'str' object has no attribute 'send' error however I can't see any problems with it.
Please help.
Thanks again!
EDIT: Here's the error(Not needed now but this is for principle)
Traceback (most recent call last):
File ".../tkcleint.py", line 76, in <module>
chat_msg_send_button = tk.Button(window, text = 'send', command = send(user, cleintsocket))
File ".../tkcleint.py", line 29, in send
cleintsock.send(usrmsg)
AttributeError: 'str' object has no attribute 'send'

Answer 1

First off (as #R.Murry has pointed out) you are calling the functions immediately and passing their return value as the command which in this case is None, so I'd start by fixing that up:
setup_confirm_button = tk.Button(window,text = 'Connect', command = setup) #don't call setup here
...
def send_button_callback():
send(user, cleintsocket)
chat_msg_send_button = tk.Button(window, text = 'send', command = send_button_callback)
next, it is important to include the whole error message in your question because that is not the line that is running into problems:
Traceback (most recent call last):
File ".../test.py", line 76, in <module>
chat_msg_send_button = tk.Button(window, text = 'send', command = send(user, cleintsocket))
File ".../test.py", line 29, in send
cleintsock.send(usrmsg)
AttributeError: 'str' object has no attribute 'send'
You pass the variable cleintsocket into send and try to use the .send method of a socket, however it is initialized to an empty string:
cleintsocket = ''
so if you call send before it is changed to a socket you will get that error, simply check whether it has been initialized yet:
def send(username, cleintsock):
'''to send a message'''
if cleintsock: #not an empty string
usrmsg = (username + ' - ' + chat_msg_box.get()).encode()
cleintsock.send(usrmsg)
#else:window.bell() #play a error beep