python - 从服务器读取消息并将其存储在文件中并在 Tkinter 中显示

Question

我正在读取一个文件“server.txt”，在该文件中我接收来自客户端的文本消息并将其显示在 Tkinter 窗口上。代码在这里

from Tkinter import *
import tkMessageBox

root = Tk()
frame = Frame(root)
frame.pack()
root.geometry("500x500")
text_area = Text(frame)
text_area.pack(side=BOTTOM)

while(1):
  text_area.delete(1.0, END)   
  fo = open("server.txt", "r")
  str = fo.read(500000);
  text_area.insert(END,str+'\n')
  print "Read String is : ", str
  # Close opend file
  fo.close()
root.mainloop()

当我在命令行中打开它时，它在 ubuntu 中不起作用？

如何做到这一点？

Answer 1

在调用 root.mainloop() 之前，您将永远循环 while 函数，这意味着 Tkinter 窗口永远不会弹出，但您的 while 语句中的 print 语句将被无意识地发送垃圾邮件

这是工作代码，使用 after 函数 after

    from Tkinter import *

# This function will be run every N milliseconds
def get_text(root,val,name):
    # try to open the file and set the value of val to its contents 
    try:
        with open(name,"r") as f:
            val.set(f.read())
    except IOError as e:
        print e
    else:
        # schedule the function to be run again after 1000 milliseconds  
        root.after(1000,lambda:get_text(root,val,name))

root = Tk()
root.minsize(500,500)
eins = StringVar()
data1 = Label(root, textvariable=eins)
data1.config(font=('times', 12))
data1.pack()
get_text(root,eins,"server.txt")
root.mainloop()