[英]multiple python UDP socket & UI
我對python非常陌生,仍處於閱讀階段。 我有兩個問題要討論。 我需要使用tkinter
開發一個python基本用戶界面,該界面應在Raspberry Pi2上運行。 在后台進程中,我需要創建多個基於python的UDP套接字服務器和客戶端。
當用戶按下任意按鈕並從組合框中選擇任何值時,我需要將數據發送到c ++應用程序。 同樣,我需要使用從C ++應用程序收到的消息來更新UI。
我已經在python中創建了基本的UI和UDP套接字,它可以按預期工作。 現在,我需要擴展它,以便可以將UI數據發送到UDP Socket腳本,然后從那里發送到C ++應用程序。
這是我的python代碼:
from tkinter import *
from tkinter import ttk
class MainWindow(Frame):
def __init__(self):
Frame.__init__(self)
self.master.title("Test")
self.master.minsize(330, 400)
self.grid(sticky=E+W+N+S)
modeFrame = Frame(self)
actionFrame = Frame(self)
msgframe = Frame(self)
modeFrame.pack(side="top", fill="x")
actionFrame.pack(side="top", fill="x")
msgframe.pack(side="top", fill="x")
# Mode Frame
Label(modeFrame, text="Mode :", font="bold").pack(side="left")
modeFrame.canvas1 = Canvas(modeFrame, height=25, width=25)
modeFrame.setupled = modeFrame.canvas1.create_oval(5, 5, 20, 20, fill="green")
modeFrame.canvas1.pack(side="left")
Label(modeFrame, text="Setup Mode").pack(side="left")
modeFrame.canvas2 = Canvas(modeFrame, height=25, width=25)
modeFrame.setupled = modeFrame.canvas2.create_oval(5, 5, 20, 20, fill="black")
modeFrame.canvas2.pack(side="left")
Label(modeFrame, text="Run Mode").pack(side="left")
# Action Frame
Label(self, text="Select Coupon").pack(side="left")
self.value_of_combo = 'X'
self.combo("a,b,c")
Button(self, text="Accept", command=acceptCallback).pack(side="left")
Button(self, text="Reject", command=rejectCallback).pack(side="left")
Button(self, text="EndSession", command=endSessionCallback).pack(fill="both", expand="yes", side="bottom")
# Message Frame
self.label0frame = LabelFrame(msgframe, text="ID")
self.label0frame.pack(fill="both", expand="yes")
Label(self.label0frame, text="Waiting for Client ...").pack(side="left")
self.label1frame = LabelFrame(msgframe, text="Available Coupons")
self.label1frame.pack(fill="both", expand="yes")
Label(self.label1frame, text="Waiting for Client ...").pack(side="left")
self.label2frame = LabelFrame(msgframe, text="Scanned Code")
self.label2frame.pack(fill="both", expand="yes")
Label(self.label2frame, text="Scanned Code ...").pack(side="left")
self.label3frame = LabelFrame(msgframe, text="Status")
self.label3frame.pack(fill="both", expand="yes")
Label(self.label3frame, text="Status Message ...").pack(side="left")
def newselection(self, event):
self.value_of_combo = self.comboBox.get()
print(self.value_of_combo)
def combo(self,Values):
self.box_value = StringVar()
self.comboBox = ttk.Combobox(self, state="readonly", values=("a", "b", "c"))
self.comboBox.pack(side="left")
self.comboBox.set("a")
self.comboBox.bind("<<ComboboxSelected>>", self.newselection)
def acceptCallback():
print("send Accept Message to C++")
def rejectCallback():
print("send Reject Message to C++")
def endSessionCallback():
print("send EndSession Message to C++")
if __name__ == "__main__":
app = MainWindow()
app.mainloop()
UDP套接字代碼:
import time
import struct
import socket
import sys
MYPORT = 51506
MYGROUP_4 = '225.0.0.1'
MYTTL = 1 # Increase to reach other networks
def UDPmain():
udpApp = udpsocket()
class udpsocket():
def __init__(self):
print('UDP Socket started')
group = MYGROUP_4
self.receiver('225.0.0.1')
def sender(group):
addrinfo = socket.getaddrinfo(group, None)[0]
s = socket.socket(addrinfo[0], socket.SOCK_DGRAM)
# Set Time-to-live (optional)
ttl_bin = struct.pack('@i', MYTTL)
if addrinfo[0] == socket.AF_INET: # IPv4
s.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, ttl_bin)
else:
s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_HOPS, ttl_bin)
while True:
data = repr(time.time())
s.sendto(data + '\0', (addrinfo[4][0], MYPORT))
time.sleep(1)
def receiver(self,group):
print('Receiver')
# Look up multicast group address in name server and find out IP version
addrinfo = socket.getaddrinfo(group, None)[0]
# Create a socket
s = socket.socket(addrinfo[0], socket.SOCK_DGRAM)
# Allow multiple copies of this program on one machine
# (not strictly needed)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
# Bind it to the port
s.bind(('', MYPORT))
group_bin = socket.inet_pton(addrinfo[0], addrinfo[4][0])
# Join group
if addrinfo[0] == socket.AF_INET: # IPv4
mreq = group_bin + struct.pack('=I', socket.INADDR_ANY)
s.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
else:
mreq = group_bin + struct.pack('@I', 0)
s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_JOIN_GROUP, mreq)
# Loop, printing any data we receive
while True:
data, sender = s.recvfrom(1500)
while data[-1:] == '\0': data = data[:-1] # Strip trailing \0's
print (str(sender) + ' ' + repr(data))
請看一下我提到的用戶界面和評論
我感謝解決整個問題的人們。 抱歉,保留了很長時間
Python也可以使用select
:請參見https://docs.python.org/3.4/library/select.html?highlight=select.select#select.select FD_SET
內容已為您處理; 您只提供文件描述符(或文件對象)的列表。
這里有幾種選擇。 一種是簡單地將其他腳本直接合並到您的主代碼中,並使用multiprocessing
來調用它們的入口點。 https://docs.python.org/3.4/library/multiprocessing.html?highlight=multiprocess#the-process-class如果您希望分別調用它們,則還有其他選項,具體取決於您的操作系統( os.spawn
, os.fork
+ os.execl
, subprocess
os.execl
)
將(3) tkinter
其他了解tkinter
。
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