单选按钮 tkinter 传递主机值

Question

尝试使用单选按钮来选择我所指的主机，因为最终会有 只有两个，它们是固定地址。

这是错误： 调用中的文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py”，第 1410 行 返回 self.func(*args) 文件“Untitled 2.py”，第 63 行，在 command=lambda: callback_power_off(off, host)) 文件“Untitled 2.py”，第 28 行，在 callback_power_off 中 连接.连接（（主机，端口）） 文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py”，第 224 行，在 meth 返回 getattr(self._sock,name)(*args) TypeError：强制转换为 Unicode：需要字符串或缓冲区，找到实例

from Tkinter import *
from socket import *
port = 7142

on = '02 00 00 00 00'
off = '02 01 00 00 00'




def callback_power_on(data, host):
    if not host:
        print "No host given!"
        return
    print "power on!"
    connection = socket(AF_INET, SOCK_STREAM)
    connection.connect((host, port))
    connection.sendall(add_checksum(data))
    connection.close()


def callback_power_off(data, host):
    if not host:
        print "No host given!"
        return
    print "power off!"
    connection = socket(AF_INET, SOCK_STREAM)
    connection.connect((host, port))
    connection.sendall(add_checksum(data))
    connection.close()


def add_checksum(s):
    result = []
    acc = 0
    for hexcode in s.split():
        code = int(hexcode, 16)
        acc += code
        result.append(chr(code))
    result.append(chr(acc))
    return ''.join(result)

master = Tk()
host = StringVar()
Radiobutton(master, text="Silas", variable = host, value ="172.25.13.10").pack(anchor=W)
Radiobutton(master, text="Beatrice", variable = host, value ="172.25.13.12").pack(anchor=W)

#entered_host = StringVar()
#e = Entry(master, textvariable=entered_host)
#e.pack()

b = Button(
    master,
    text="Power On",
    command=lambda: callback_power_on(on, host))
    #command=lambda: callback_power_on(on, host)

b.pack()

c = Button(
    master,
    text="Power Off",
    command=lambda: callback_power_off(off, host))
    #command=lambda: callback_power_on(on, host)
c.pack()

mainloop()

Answer 1

我认为问题在于 connect 需要一个字符串，但您传入的是 StringVar 实例。使用StringVar 方法get() 检索字符串值。

这里是您的示例的细微变化，请注意在按钮命令函数中使用 entered_host.get()：

from Tkinter import *
from socket import *
port = 7142

on = '02 00 00 00 00'
off = '02 01 00 00 00'


def callback_power_on(data, host):
    if not host:
        print "No host given!"
        return
    print "power on!"
    connection = socket(AF_INET, SOCK_STREAM)
    connection.connect((host, port))
    connection.sendall(add_checksum(data))
    connection.close()


def callback_power_off(data, host):
    if not host:
        print "No host given!"
        return
    print "power off!"
    connection = socket(AF_INET, SOCK_STREAM)
    connection.connect((host, port))
    connection.sendall(add_checksum(data))
    connection.close()


def add_checksum(s):
    result = []
    acc = 0
    for hexcode in s.split():
        code = int(hexcode, 16)
        acc += code
        result.append(chr(code))
    result.append(chr(acc))
    return ''.join(result)

master = Tk()

entered_host = StringVar()
e = Entry(master, textvariable=entered_host)
e.pack()

b = Button(
    master,
    text="Power On",
    command=lambda: callback_power_on(on, entered_host.get()))
b.pack()

c = Button(
    master,
    text="Power Off",
    command=lambda: callback_power_off(off, entered_host.get()))
c.pack()

mainloop()