Question

我确实遇到了问题，我无法解决问题。问题是，我有两个单独的按钮。在一个按钮中，我想加载一个选定的文件。而另一个我想做一些搜索。但是，如果不再运行整个函数，我就无法将变量从一个函数变为另一个函数。这意味着，查找按钮现在没用了。

from __future__ import print_function
from Tkinter import *
from Tkinter import Tk
from tkFileDialog import askopenfilename


def openFile():
    Tk().withdraw()
    txtFile = askopenfilename(defaultextension=".txt", filetypes=(("something", "*.txt"),("All Files", "*.*") ))
    print(txtFile)
    return txtFile


def Function():
    txtFile = openFile()
    with open(txtFile) as fp, open(('c:/map/test.txt'), 'w') as fo:
        for line in fp:

            if ('Hello') in line:
                content = line.strip() + " Hello detected "
            else:
                content = line.strip()
            fo.write(content + "\n")


def presentGUI():
    root = Tk()
    root.title("simulation")

    # Buttons
    button1 = Button(root, text="Select .txt file", command=openFile)
    button2 = Button(root, text="Run !", width=28, command=Function)

    # grid
    button1.grid(row=1, column=1)
    button2.grid(row=3, columnspan=3)

    root.mainloop()

presentGUI()

Answer 1

两种方法

为txtFile使用全局变量
使用OO并将函数创建为类的一部分，以便它们可以共享变量。

我给了你一个选项2的例子。因为这是我喜欢的工作方法。

如果您点击＆＃34;运行！＆＃34;并且没有点击＆＃34;选择.txt文件＆＃34;首先它会提示你选择一个文件。您可以从“应用程序”中的任何方法访问self.txtFile变量。类。

from __future__ import print_function
from Tkinter import *
from Tkinter import Tk
from tkFileDialog import askopenfilename

class Application(Frame):
    def __init__(self,parent,**kw):
        Frame.__init__(self,parent,**kw)
        self.txtFile = None
        self.presentGUI()

    def openFile(self):
        ##Tk().withdraw()
        self.txtFile = askopenfilename(defaultextension=".txt", filetypes=(("something", "*.txt"),("All Files", "*.*") ))
        print(self.txtFile)

    def Function(self):
        if self.txtFile == None:
            self.openFile()
        with open(self.txtFile) as fp, open(('c:/map/test.txt'), 'w') as fo:
            for line in fp:

                if ('Hello') in line:
                    content = line.strip() + " Hello detected "
                else:
                    content = line.strip()
                fo.write(content + "\n")


    def presentGUI(self):      
        # Buttons
        self.button1 = Button(self, text="Select .txt file", command=self.openFile)
        self.button2 = Button(self, text="Run !", width=28, command=self.Function)

        # grid
        self.button1.grid(row=1, column=1)
        self.button2.grid(row=3, columnspan=3)

if __name__ == '__main__':
    root = Tk()
    root.title("simulation")
    app = Application(root)
    app.grid()
    root.mainloop()

Python - GUI（TKinter），从其他函数获取变量而不运行整个函数agan

1 个答案: