Question

我正在尝试制作一个非常基本的程序，它将在labelframe中垂直显示一个窗口和一组Checkbox。我希望Checkboxes根据列表的内容自动生成。我找到了一个来自这里有类似愿望的人的条目并复制了他的代码，但我收到了错误：“TypeError：list indices必须是整数或切片，而不是str”

我是Python的新手，尝试了所有方法来纠正这个问题但是很快就会出现问题。任何帮助都会很棒！完整代码如下：

from tkinter import *

#list to be used to make Checkboxes
pg = ["goal1","goal2"]


class yeargoals:
global pg
def __init__(self,master):
    self.master = master
    master.title("This Year's Goals")

    #Makes the label Fram I want the Checkboxes to go in
    self.LabelFramep= LabelFrame()
    self.LabelFramep.configure(width=210)

    #Makes the Checkboxs from the list above
    for goal in pg:
        pg[goal] = Variable()
        l = Checkbutton(self.LabelFramep, text=goal, variable=pg[goal])
        l.pack()


root = Tk()
Window = yeargoals(root)
root.mainloop()

Answer 1

循环for goal in pg:已经为变量goal中的每个目标文字提供了：

>>> pg = ["goal1","goal2"]
>>> for goal in pg:
...   print goal
...
goal1
goal2

执行pg[goal]后，尝试在列表中查找索引"goal1"，这是一个错误。所以文本已经goal（你有），变量只需要是一个新变量。

for goal in pg:
    l = Checkbutton(self.LabelFramep, text=goal, variable=Variable())
    l.pack()

Answer 2

下面的示例生成了我能想到的最简单的类，它从列表中创建Fiddle：

import tkinter as tk

class CheckbuttonList(tk.LabelFrame):
    def __init__(self, master, text=None, list_of_cb=None):
        super().__init__(master)

        self['text'] = text
        self.list_of_cb = list_of_cb
        self.cb_values = dict()
        self.check_buttons = dict()

        if self.list_of_cb:
            for item in list_of_cb:
                self.cb_values[item] = tk.BooleanVar()
                self.check_buttons[item] = tk.Checkbutton(self, text=item)
                self.check_buttons[item].config(onvalue=True, offvalue=False,
                                            variable=self.cb_values[item])
                self.check_buttons[item].pack()



if __name__ == '__main__':

    root = tk.Tk()

    my_list = ["item1", "item2", "item3"]

    my_cbs = CheckbuttonList(root, "My Checkbox List", my_list)
    my_cbs.pack()

    root.mainloop()

如何从列表中创建复选框

2 个答案: