Python Tkinter上一页复选框/复选框值的条件显示

我目前正在使用tkinter开发GUI，遇到了一个问题

我希望用户能够：

要在“传感器历史记录主页”页面中从复选按钮中选择任意数量的列，每个列名称1， 然后，当点击一个按钮时，会弹出一个新页面“sensors\u custom\u history”（传感器自定义历史记录），显示每个选定列的一些内容。 请在下面找到最小可复制示例：

import tkinter as tk
import configparser, pickle

class UI_demo:

  def __init__(self, master=None):
        """
        # Load config_back.ini parameters
        config = configparser.ConfigParser()
        config.read('setup_front.ini')
        self.output_folder = config['DEFAULT']['path_to_output_folder']
        print("config_front.ini file was successfully loaded ! \n")
        
        # Load in-scope columns
        with open(self.output_folder+"headers_inscope", 'rb') as f:
            self.columns = pickle.load(f)
        """
        self.columns = ["Var1", "Var2", "Var3", "Var4", "Var5"] # Simple sample as the actual dataset is private
        super().__init__()
        self.master = master
        self.master.geometry("1650x1000")
        self.master.state('zoomed')
        
        self.initHomePageUI()

  def initHomePageUI(self):

        self.master.title("Homepage")
        
        # Some stuff....
        
        # Menu buttons
        frame1 = tk.Frame(self.master)
        frame1.pack(side="top", fill="both", pady=20, expand=True)        
        
        but3 = tk.Button(frame1, text="History", font=('Courier',12), 
                         bd=3, width=36, command = self.sensors_history_homepage)
        but3.pack(side="top", pady=12)

  def sensors_history_homepage(self):
        
        # Open new window
        window = tk.Toplevel(self.master)
        window.title("Sensors selection")
        window.state('zoomed')
        
        # Top empty frame
        top_frame = tk.Frame(window, height=80)
        top_frame.pack(side='top', fill='x')
        
        # Page header
        title0 = tk.Label(window, borderwidth=1, text="Please select sensor(s) you wish to consult")
        title0.config(font=('Courier',14))
        title0.pack(side='top')
        
        # List of sensors as check-buttons (10 sensors per column as in real-case I have 200+ sensors to display)
        frame0 = tk.Frame(window, borderwidth=1)
        frame0.pack(side='top', fill='x')
        
        l_frames = []
        l_checkvar = []
        l_checkb = []
        
        for i in range(int(len(self.columns)/10)):
            
            l_frames = l_frames + [tk.Frame(frame0, borderwidth=1)]
            l_frames[i].pack(side='left')
            
            l_checkvar = l_checkvar +[tk.BooleanVar(master=window) for l in range(10)]
            
            l_checkb = l_checkb + [tk.Checkbutton(l_frames[i], text=self.columns[10*i+l], variable=l_checkvar[10*i+l],
                                                  onvalue=True, offvalue=False, height=2, width=10) for l in range(10)]
            
            for j in range(10*i,10*i+9):
                
                l_checkb[j].pack(side='top')
                l_checkb[j].toggle()
        
        tmp_residual = int(len(self.columns)%10)
        
        if not tmp_residual==0:
           
            i = int(len(self.columns)/10)
            
            l_checkvar += [tk.BooleanVar(master=window) for l in range(10*i,10*i+tmp_residual)]
            
            l_frames += [tk.Frame(frame0, borderwidth=1)]
            l_frames[i].pack(side='left')
            
            l_checkb += [tk.Checkbutton(l_frames[i], text=self.columns[10*i+l], variable=l_checkvar[10*i+l], 
                                                  onvalue=True, offvalue=False, height=2, width=10) for l in range(0,tmp_residual)]
            
            for l in range(0,tmp_residual):
                l_checkb[10*i+l].pack(side='top')
                l_checkb[10*i+l].toggle()
                
        
        # Check all / Uncheck all buttons
        def check_all():
            self.checkvars = [x.set(True) for x in self.checkvars]
        
        def uncheck_all():
            self.checkvars = [x.set(False) for x in self.checkvars]
        
        frame1 = tk.Frame(window, borderwidth=1)
        frame1.pack(side='top', fill='x')
        
        but_ca = tk.Button(frame1, text="Check all", font=('Courier',10), bd=3,
                           command=check_all)
        but_ca.pack(side='left', padx=5)
        
        but_ua = tk.Button(frame1, text="Uncheck all", font=('Courier',10), bd=3,
                           command=uncheck_all)
        but_ua.pack(side='left', padx=5)
        
        self.checkvars = l_checkvar
        
        # Button to display selected sensors' signal history
        refresh_frame = tk.Frame(window, borderwidth=1)
        refresh_frame.pack(side='top', fill='x')
        
        refresh_but = tk.Button(refresh_frame, text="Display \n for selected sensors", font=('Courier',12), 
                         bd=3, width=30, command=self.sensors_custom_history)
        refresh_but.pack(side='top')
        
  def sensors_custom_history(self):
      
        # Open new window
        window = tk.Toplevel(self.master)
        window.title("Display of...")
        window.geometry("1500x970")
        window.state('zoomed')
        
        # Page header
        title0 = tk.Label(window, borderwidth=1, text="Sensors history")
        title0.config(font=('Courier',14))
        title0.pack(side='top')
        
        # List of previously selected sensors 
        l_cols = []
        l_checkvalues = list(map(lambda x: x.get(), self.checkvars))
        
        for i in range(len(l_checkvalues)):
            if l_checkvalues[i]==True:
                l_cols = l_cols + [self.columns[i]]
        
        # Some display on the page....

        # Debugging console display
        print("checkvars : length = "+str(len(l_checkvalues))+", nb of true = "+str(sum(l_checkvalues))+'\n')
        print(l_checkvalues)
        print('\n'+"columns selected : length = "+str(len(l_cols))+'\n')
        print(l_cols)

if __name__ == '__main__':
    root = tk.Tk()
    app = UI_demo(master=root)
    root.mainloop() 

我的问题是关于将checkVar值从“传感器历史记录”页面传递到“传感器自定义历史记录”页面的问题：

似乎无论在“传感器历史记录”主页中选择了哪些复选框，“传感器历史记录”的打印都会给出相同的结果。 尝试从第2页获取checkVars值时出现以下错误： 我想知道如何正确地将checkVars值传递到“sensors\u custom\u history”页面，以便只显示用户在以前的“sensors\u history\u主页”中选择的信息

---

任何帮助都将不胜感激。

这可能不是问题的全部，但是您的check\u all/uncheck\u all函数通过将none列表重新分配给self.checkvars，正在破坏self.checkvars。列表理解并不适用于简单地对列表中的每个项目做一些事情，它们的目的是生成一个新的列表。嗨@jasonharper，事实上，这似乎是整个问题所在。如果我启动UI并从列表中选择，而不使用check_alan和uncheck_all按钮，我会得到预期的结果。因此，如何在不重新写入相关的复选框的情况下，选中/取消选中带有2个按钮的所有复选框？非常感谢您的帮助。简单地去掉这两个函数中self.checkvars的赋值就可以修复它们，但是您仍然无法生成Nones列表。编写类似内容的正确方法是使用两行：self.checkvars:/x.setTrue中的x

File "<ipython-input-3-8b450e7f0e91>", line 149, in sensors_custom_history
    l_checkvalues = list(map(lambda x: x.get(), self.checkvars))
File "<ipython-input-3-8b450e7f0e91>", line 149, in <lambda>
  l_checkvalues = list(map(lambda x: x.get(), self.checkvars))
AttributeError: 'NoneType' object has no attribute 'get'