Question

这是我控制智能电视的Python软件的一部分。我有“connection_status”功能。

import fcntl, socket, struct
import base64
import time, datetime
import netifaces
from Tkinter import *

root = Tk()
root.title("Pepin's Samsung Smart TV Remote")
root.geometry("391x595") #391

class Application():
    """Pepin's Samsung Smart TV Remote"""

    def __init__(self, master):

        self.master = master
        self.create_widgets()

    def connection(self):

        self.connection_status()


    def connection_status(self): // this is the function that does not work right.

        try:

            connection_status = sock.recv(64)
            print("Status: Connected")
            self.label_connection_status['text'] = 'Status: Connected'

        except socket.timeout:

            connection_status = ""
            print("Status: Disconnected")
            self.label_connection_status['text'] = 'Status: Disconnected'

        self.master.after(1000, self.connection_status, self.master)

    def create_widgets(self):
            btn_connect = Button(self.master, text = "CONNECT TO TV", width=19, height=2, command = lambda: self.connection()) 

app = Application(root)
root.mainloop()

但是当我调用该函数时，它会输出我的错误：

Status: Connected
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1535, in __call__
    return self.func(*args)
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 586, in callit
    func(*args)
TypeError: connection_status() takes exactly 1 argument (2 given)

即使电视断开连接，状态也会保持“已连接”状态！

Answer 1

您使用以下代码行调用self.connection_status：

self.master.after(1000, self.connection_status, self.master)

这将导致以下函数调用：

self.connection_status(self.master)

但是，connection_status不接受除self以外的任何参数，这些参数由python自动添加。这就是您收到错误connection_status() takes exactly 1 argument (2 given)的原因。 self是第一个参数，self.master是第二个参数，但该函数只能接受self。

几乎没有理由将对象属性传递给同一对象的另一个方法，因为该方法可以立即访问这些属性。因此，简单的解决方案是从after调用中删除参数：

self.master.after(1000, self.connection_status)

连接状态功能出错并且无法正常工作

1 个答案: