python tkinter button命令在执行时执行命令，而不是按按钮时执行命令

Question

我目前正在学习python，并尝试使用一个tkinter按钮将变量从几个输入字段传递到另一个文件中的函数。 该按钮调用另一个模块内的扫描功能。在

由于某些原因，我一开始就执行这个功能，而不是点击按钮。我不明白为什么。 “开始扫描”按钮下的“查找”按钮 我希望得到你的支持

from tkinter import *
from PIL import Image, ImageTk
from Sockets_Portscanner_threaded import *


# Here, we are creating our class, Window, and inheriting from the Frame


# class. Frame is a class from the tkinter module. (see Lib/tkinter/__init__)
class Window(Frame):


    # Define settings upon initialization. Here you can specify
    def __init__(self, master=None):


        # parameters that you want to send through the Frame class. 
        Frame.__init__(self, master)   

        #reference to the master widget, which is the tk window                 
        self.master = master

        #with that, we want to then run init_window, which doesn't yet exist
        self.init_window()

    #Creation of init_window
    def init_window(self):

        # changing the title of our master widget      
        self.master.title("GUI")

        # allowing the widget to take the full space of the root window
        self.pack(fill=BOTH, expand=1)


        ####################
        #       FORM       #
        ####################

        #Grid labels
        Label(self, text="Please enter the Parameters For portscanning!").grid(row=0, column=1)
        Label(self, text="Server/domain").grid(row=2)
        Label(self, text="Ports:").grid(row=4, column=0)
        Label(self, text="From").grid(row=5)
        Label(self, text="To").grid(row=6)

        # creating a entry forms
        E1 = Entry(self)
        E2 = Entry(self)
        E3 = Entry(self)

        # placing entry forms in grid
        E1.grid(row=2, column=1)
        E2.grid(row=5, column=1)
        E3.grid(row=6, column=1)

        # Setting defaul variables for entry
        E1.insert(10,'localhost')
        E2.insert(10,'1')
        E3.insert(10,'500')
        ####################
        #       \FORM      #
        ####################

        # Start Scanning button
        Button(self, text='Show', command=scan(E1.get(),E2.get(),E3.get())).grid(row=7, column=1, sticky=W, pady=4)


    def client_exit(self):
        exit()



# root window created. Here, that would be the only window, but
# you can later have windows within windows.
root = Tk()

root.geometry("400x300")

#creation of an instance
app = Window(root)


#mainloop 
root.mainloop()  

此按钮中的扫描功能位于套接字扫描程序线程文件中

^{pr2}$

Answer 1

你可以试着用lambda。在

尝试使用：

Button(self, text='Show', command= lambda: scan(E1.get(),E2.get(),E3.get()) )

这将把事件中的信息传递到按钮中。在

你可以参考一下。https://pythonprogramming.net/passing-functions-parameters-tkinter-using-lambda/

希望有帮助