动态创建的按钮tkinter的引用函数迭代 [英] referencing function iterations for dynamically created buttons tkinter

问题描述

我已经动态创建了按钮并将其设置为调用脚本功能，因此当单击 Test 1 时，将执行 script_1 ，同样为 script_2 进行测试2 ，依此类推...
但在时单击测试1 或测试2 ，执行 script_0 。似乎 val = i.get（）每次总是返回值0。有没有办法获取当前的 i值？

I have created buttons dynamically and set them to call script function so when Test 1 is clicked script_1 is executed, likewise Test 2 for script_2 and so on... but when Test 1 or Test 2 is clicked script_0 is executed. It appears val = i.get() always returns the value 0 each time. Is there a way to get the current i value?

函数

def script():
    if running:
        i = IntVar()
        val = i.get()
        subprocess.Popen(['python', 'script_' + str(val) + '.py'])
    root.update()

按钮

for i in range(3):
    button.append(tk.Button(root, text="Test " + str(i + 1), font=(None, 16), command=lambda i=i: script()))
    button[-1].grid(column=0, row=i + 1)

推荐答案

那是因为您在前一行初始化 i ，而IntVar始终初始化为0。您需要将 i 传递为脚本的参数：

That's because you initialize i the line before, and IntVar always initializes to 0. You need to pass i as an argument to your script:

from Tkinter import Button, IntVar, Tk
import subprocess
def script(i):
    subprocess.Popen(['python', 'script_' + str(i) + '.py'])
    root.update()

root = Tk()
button = []   
for i in range(3):
    button.append(Button(root, text="Test " + str(i + 1), font=(None, 16), command=lambda i=i: script(i)))
    button[-1].grid(column=0, row=i + 1)

root.mainloop()

这对我来说分别正确弹出script_0.py，1,2。考虑将root包裹在一个类中是一种很好的做法（类似于继承Tk），并将按钮作为 __ init __ 的一部分。

This correctly popens script_0.py,1,2 respectively for me. Consider wrapping root in a class as good practice (some like to inherit Tk), and making the buttons a part of __init__.

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