如何在Tkinter中基于更新后的数据重新绘制Label与Entry控件？

你的问题核心是全局变量未正确更新和控件列表未清空导致的GUI刷新异常，以下是具体修复方案：

问题根源 #

1. 切换列表时，函数内创建的frm_ent_bilans是局部变量，未关联到全局框架，导致新框架无法显示，旧框架的控件残留
2. entry_list_bilans每次添加新Entry但未清空，导致后续生成文本时会读取旧控件的数据
3. lst_bilans在函数内被重新赋值为局部变量，全局列表未更新，生成文本时仍用旧数据

修复步骤 #

1. 在切换函数中用global声明要修改的全局变量，确保修改的是全局对象
2. 每次切换前清空entry_list_bilans，避免旧控件引用残留
3. 新创建的框架必须调用grid方法布局到正确位置
4. 封装控件生成逻辑，减少重复代码

修改后的完整代码 #

import tkinter as tk
import re
import pyperclip
import textwrap
from tkmacosx import Button
from tkinter import ttk
import random

window=tk.Tk()
window.title("Myszkoprogram, ver 1.2")
tab_control = ttk.Notebook(master=window)
tab_control.grid(row=0, column=0)
tab1 = ttk.Frame(master=tab_control)
tab2 = ttk.Frame(master=tab_control)

def validate_input(text):
    return re.match("^[0-9,]*$", text) is not None

vcmd = (window.register(validate_input), "%P")

dash = '–'

opis_przycisku_2 = textwrap.fill("Usuń zawartość komórek", width=20)

tab_control.add(tab1, text = "Morfologia i biochemia")
tab_control.add(tab2, text = "Bilans płynów")

liczba_drenow=1
lst_bilans_1 = ["Płyny dożylne", "Płyny doustne", "Sonda", "Dreny", "Mocz"]
lst_bilans_2 = ["PFFFF", "DADAWDW", "Sonda", "L", "P", "Mocz", "MALAKAKAKAAA", "BLAAAAH"]
lst_bilans=lst_bilans_1

lst_bilans_unit="ml"
lst_words_for_bilans=["zanotowano", "wpisano", "zapisano", "napisano"]

frm_bilans_part = tk.Frame(master=tab2)
frm_bilans_part.grid(row=0, column=0)

frm_full_data_bilans = tk.Frame(master=frm_bilans_part)
frm_full_data_bilans.grid(row=0, column=0)

frm_btn_bilans = tk.Frame(master=frm_bilans_part)
frm_btn_bilans.grid(row=0, column=1)

frm_text_bilans = tk.Frame(master=frm_bilans_part)
frm_text_bilans.grid(row=0, column=2)

lbl_info_bilans = tk.Label(master=frm_full_data_bilans, text="Bilans płynów:")
lbl_info_bilans.grid(row=0, column=0)

frm_ent_bilans = tk.Frame(master=frm_full_data_bilans)
frm_ent_bilans.grid(row=1, column=0)

entry_list_bilans=[]

def paint_entry(target_list):
    # 清空控件列表
    entry_list_bilans.clear()
    # 生成新的Label和Entry
    for idx, value in enumerate(target_list):
        lbl_bilans=tk.Label(master=frm_ent_bilans, text=value + ":")
        lbl_bilans.grid(row=idx, column=0)
        ent_bilans=tk.Entry(master=frm_ent_bilans, validate="key", validatecommand=vcmd)
        ent_bilans.grid(row=idx, column=1)
        entry_list_bilans.append(ent_bilans)

paint_entry(lst_bilans)

def create_bilans():
    data_bilans = str()
    values = [ent.get() for ent in entry_list_bilans]
    for idx, value in enumerate(values):
        if value == "":
            continue
        else:
            data_bilans = data_bilans + lst_bilans[idx] + " {0} " + value + " " + lst_bilans_unit + ", "
    if data_bilans:
            data_bilans = "W bilansie wodnym {1}: " + data_bilans[:len(data_bilans)-2] + "."
    else:
        data_bilans = str()
    random_word = random.choice(lst_words_for_bilans)
    variables_for_data_bilans = [dash, random_word]
    data_bilans = data_bilans.format(*variables_for_data_bilans)
    pyperclip.copy(data_bilans)
    wrapped_data_bilans = textwrap.fill(data_bilans, width=75)
    lbl_text_bilans["text"] = wrapped_data_bilans

def remove_text_bilans():
    for ent in entry_list_bilans:
        ent.delete(0, tk.END)

def change_dren_number_to_1():
    global frm_ent_bilans, lst_bilans
    # 销毁旧框架
    frm_ent_bilans.destroy()
    # 创建新框架并布局
    frm_ent_bilans = tk.Frame(master=frm_full_data_bilans)
    frm_ent_bilans.grid(row=1, column=0)
    # 更新全局列表
    lst_bilans = lst_bilans_1
    # 生成新控件
    paint_entry(lst_bilans)

def change_dren_number_to_2():
    global frm_ent_bilans, lst_bilans
    frm_ent_bilans.destroy()
    frm_ent_bilans = tk.Frame(master=frm_full_data_bilans)
    frm_ent_bilans.grid(row=1, column=0)
    lst_bilans = lst_bilans_2
    paint_entry(lst_bilans)

frm_funct_btn_bilans = tk.Frame(master=frm_btn_bilans)
frm_funct_btn_bilans.grid(row=1, column=0)

frm_number_of_dren_bilans = tk.Frame(master=frm_btn_bilans)
frm_number_of_dren_bilans.grid(row=0, column=0)

opis_przycisku_1_bilans = textwrap.fill("Utwórz tekst i skopiuj do schowka", width=20)
text_convert_bilans = Button(master = frm_funct_btn_bilans,
                      text= opis_przycisku_1_bilans,
                      command = create_bilans,
                      bg='#ADEFD1',
                      fg='#00203F',
                      borderless=1,
                      width=150)
text_convert_bilans.grid(row=0, column=0, pady=80)

btn_remove_bilans = Button(master=frm_funct_btn_bilans,
                    text = opis_przycisku_2,
                    command = remove_text_bilans,
                    bg='#E69A8D', fg='#5F4B8B',
                    borderless=1,
                    width=150,
                    activebackground=('#AE0E36', '#D32E5E'),
                    activeforeground='#E69A8D')
btn_remove_bilans.grid(row=1, column=0, pady=80)

opis_przycisku_3_bilans = textwrap.fill(("Liczba drenów {0} 2").format(dash))
btn_change_dren_to_2 = Button(master=frm_number_of_dren_bilans,
                              text = opis_przycisku_3_bilans,
                              command = change_dren_number_to_2)
btn_change_dren_to_2.grid(row=0, column=0, pady=80)

opis_przycisku_4_bilans = textwrap.fill(("Liczba drenów {0} 1").format(dash))
btn_change_dren_to_1 = Button(master=frm_number_of_dren_bilans,
                              text = opis_przycisku_4_bilans,
                              command = change_dren_number_to_1)
btn_change_dren_to_1.grid(row=0, column=1, pady=80)

lbl_text_bilans = tk.Label(master=frm_text_bilans, width=55)
lbl_text_bilans.grid(row=0, column=0)

window.mainloop()

关键修改点说明 #

• 新增paint_entry函数，统一处理控件生成逻辑，每次调用前清空entry_list_bilans
• 切换函数中添加global声明，确保修改全局的frm_ent_bilans和lst_bilans
• 新框架创建后立即调用grid(row=1, column=0)，确保显示在正确位置
• 销毁旧框架后，新框架会完全替代旧位置的控件，不会出现叠加残留

内容的提问来源于stack exchange，提问作者Łukasz Kwasik