Question

我正在阅读一个文件＆＃34; server.txt＆＃34;我从客户端接收文本消息并在Tkinter窗口中显示它们。这里是代码

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中不起作用吗？

怎么做？

Answer 1

在调用root.mainloop（）之前，你正在循环遍历while函数，这意味着Tkinter窗口永远不会弹出，但是你的while语句中的print语句会被垃圾邮件

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()

从服务器读取消息并将其存储在文件中并在Tkinter中显示它们

1 个答案: