如何将字典数据插入Tkinter的Entry组件矩阵

需要创建一个带有预定义值的Entry组件矩阵，直接输入字符串或整数时组件能正常显示对应值，但引用字典中的值时，组件显示.!labelframe3.!entry这类内容，实现代码如下：

from tkinter import *
from PIL import ImageTk, Image
from tkinter import messagebox
from tkinter import ttk

root = Tk()
root.title("Simulador de Proteção")
root.iconbitmap("logo.ico")
root.geometry("1200x800")
root.configure(background='black')


# FRAME DA CAIXA DE TESTE

# gerar lista de sinais
signals_list = ['IA', 'IB', 'IC']
initial_values = {'mag-pre':0, 'phi-pre':120, 'mag-fault':0, 'phi-fault':0, 'mag-pos':0, 'phi-pos':0}
signals_entries = dict.fromkeys(signals_list, initial_values)
signals_values = dict.fromkeys(signals_list, initial_values)
columns_list = list(initial_values.keys())

# criar o frame
frame_testbox = LabelFrame(root, text="Caixa de teste")
frame_testbox.grid(row=1, column=1, columnspan=2, padx=10, pady=10)

# mostrar nomes das linhas
row_idx = 1
for signal in signals_list:
    label = Label(frame_testbox, text=signal)
    label.grid(row=row_idx, column=0)
    row_idx += 1

# mostrar nomes das colunas
label = Label(frame_testbox, text="Sinal")
label.grid(row=0, column=0)
col_idx = 1
for col in columns_list:
    label = Label(frame_testbox, text=col)
    label.grid(row=0, column=col_idx)
    col_idx += 1

# criar campos de entrada
row_idx = 0
for signal in signals_list:
    row_idx += 1
    col_idx = 1
    for col in columns_list:
        signals_entries[signal][col] = Entry( frame_testbox, width=15, bg="white", fg="black", borderwidth=5 )
        signals_entries[signal][col].grid(row=row_idx, column=col_idx)
        signals_entries[signal][col].insert(0, signals_values[signal][col] )
        col_idx += 1

使用dict.fromkeys(signals_list, initial_values)创建字典时，所有键都会指向同一个initial_values字典对象。当你在循环中给signals_entries[signal][col]赋值Entry组件时，实际上是修改了这个共享的字典，导致signals_values里的对应值也被替换成了Entry对象。后续调用insert时，插入的是Entry对象的字符串表示（也就是.!labelframe3.!entry这类内容）。

给每个信号创建独立的initial_values副本，用字典推导式代替dict.fromkeys：

修改以下两行代码：

signals_entries = {sig: initial_values.copy() for sig in signals_list}
signals_values = {sig: initial_values.copy() for sig in signals_list}

修改后的完整代码：

from tkinter import *
from PIL import ImageTk, Image
from tkinter import messagebox
from tkinter import ttk

root = Tk()
root.title("Simulador de Proteção")
root.iconbitmap("logo.ico")
root.geometry("1200x800")
root.configure(background='black')


# FRAME DA CAIXA DE TESTE

# gerar lista de sinais
signals_list = ['IA', 'IB', 'IC']
initial_values = {'mag-pre':0, 'phi-pre':120, 'mag-fault':0, 'phi-fault':0, 'mag-pos':0, 'phi-pos':0}
# 用字典推导式创建独立的字典副本
signals_entries = {sig: initial_values.copy() for sig in signals_list}
signals_values = {sig: initial_values.copy() for sig in signals_list}
columns_list = list(initial_values.keys())

# criar o frame
frame_testbox = LabelFrame(root, text="Caixa de teste")
frame_testbox.grid(row=1, column=1, columnspan=2, padx=10, pady=10)

# mostrar nomes das linhas
row_idx = 1
for signal in signals_list:
    label = Label(frame_testbox, text=signal)
    label.grid(row=row_idx, column=0)
    row_idx += 1

# mostrar nomes das colunas
label = Label(frame_testbox, text="Sinal")
label.grid(row=0, column=0)
col_idx = 1
for col in columns_list:
    label = Label(frame_testbox, text=col)
    label.grid(row=0, column=col_idx)
    col_idx += 1

# criar campos de entrada
row_idx = 0
for signal in signals_list:
    row_idx += 1
    col_idx = 1
    for col in columns_list:
        signals_entries[signal][col] = Entry( frame_testbox, width=15, bg="white", fg="black", borderwidth=5 )
        signals_entries[signal][col].grid(row=row_idx, column=col_idx)
        signals_entries[signal][col].insert(0, signals_values[signal][col] )
        col_idx += 1

root.mainloop() # 添加这行以启动窗口事件循环

• initial_values.copy()会创建一个新的字典副本，确保每个信号对应的字典都是独立的，修改其中一个不会影响其他。
• 原代码缺少root.mainloop()，添加后才能正常显示窗口。

内容的提问来源于stack exchange，提问作者Gabriel Ribeiro