Question

我有一个简单的客户端程序，它连接到服务器并发送一些信息。它最初使用输入函数来发送数据，但我希望它在GUI中，因此您可以按一个按钮来发送数据。但是我一直收到名称错误，当我尝试使用按钮调用它时，它没有定义sendinfo。

# client.py

import socket import sys from tkinter import Tk, Label, Button

soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
soc.connect(("127.0.0.1", 12345))

#clients_input = input("What you want to proceed my dear client?\n")
#soc.send(clients_input.encode("utf8")) # we must encode the string to bytes
#result_bytes = soc.recv(4096) # the number means how the response can be in bytes
#result_string = result_bytes.decode("utf8") # the return will be in bytes, so decode

#print("Result from server is {}".format(result_string))

class GUI:
    # some sort of initialise
    def __init__(self, master):
        self.master = master
        master.title("Our Server GUI")

        self.label = Label(master, text="This is our Server GUI!")
        self.label.pack()

        self.greet_button = Button(master, text="Send", command=sendinfo(self))
        self.greet_button.pack()

        self.close_button = Button(master, text="Quit", command=master.quit)
        self.close_button.pack() class DataSend:
    def sendinfo(self):
        test = 666
        soc.send(test.encode("utf8"))
        result_byte = soc.recv(4096)
        result_strings = result_byte.decode("utf8")
        print("Result from server is {}".format(result_strings))

## Run program to
## 1 - Open a GUI root = Tk() my_gui = GUI(root)

root.mainloop() #Runs the GUI on a loop so it always shows?

错误：

C:\Users\stuar\PycharmProjects\test\venv\Scripts\python.exe
F:/College/CyberLvl5/Feb/Programming/TestClient.py Traceback (most
recent call last):   File
"F:/College/CyberLvl5/Feb/Programming/TestClient.py", line 43, in
<module>
    my_gui = GUI(root)   File "F:/College/CyberLvl5/Feb/Programming/TestClient.py", line 27, in
__init__
    self.greet_button = Button(master, text="Send", command=sendinfo(self)) NameError: name 'sendinfo' is not defined

Process finished with exit code 1

Answer 1

使用

行

self.greet_button = Button(master, text="Send", command=sendinfo(self))

你告诉Python“使用参数sendinfo调用全局函数self并将该函数调用的结果绑定到command”。但是该名称的全局函数不存在，并且调用它并将结果绑定到command也没有意义。相反，您希望将方法 sendinfo self 本身绑定到命令，就像您所做的那样关闭按钮。

self.greet_button = Button(master, text="Send", command=self.sendinfo)

如何使用GUI按钮调用函数/过程？

1 个答案: