python - 使用 dill 库时出现 TypeError : can't pickle _tkinter. tkapp 对象

Question

所以，我有这样的课:

class Category:
def __init__(self,name):
    self.bt = Button(t, text = name, command = lambda : opencategory(name))
    self.packing()
def packing(self):
    self.bt.pack(fill = X)
def pack_forg(self):
    self.bt.pack_forget()

然后我创建类别对象列表，例如:

list_cat = [Category("a"), Category("b"), Category("c")]

我使用 dill 模块将此列表保存到文件中:

   if list_cat != []:
        with open("file.pkl","wb") as f2:
            dill.dump(list_cat, f2)

但是当我运行它时，它会返回 TypeError: can't pickle _tkinter.tkapp我对任何类型的解决方案持开放态度，使用 JSON、pickle、dill 或其他任何东西。
这是一个完整的工作代码:

from tkinter import *
import os.path
from os import path
import dill

t = Tk()
t.title("test7")
t.geometry("100x300")
a = 1
list_cat = []

if path.exists("test777.pkl"):
    with open("test777.pkl","rb") as filee:
        list_cat = dill.load(filee)    

def opencategory(sampletext):
    print(sampletext)

class Category:  
    def __init__(self,sampletext):
        self.bt = Button(t, text = sampletext, command = lambda : opencategory(sampletext))
        self.packing()
    def packing(self):
        self.bt.pack(fill = X)
    def pack_forg(self):
        self.bt.pack_forget()


def save_c():
    if list_cat != []:
        with open("test777.pkl","wb") as file:
            dill.dump(list_cat, file)
def add_c():
    global a 
    list_cat.append(Category(a))
    a += 1


save = Button(t, text = "save", command = save_c)
save.pack(fill = X)
add = Button(t, text = "add", command = add_c)
add.pack(fill = X)


for i in list_cat:
    i.packing()

Answer 1

您正在尝试 pickle 对象列表。这些对象中的每一个都包含一个小部件。你不能 pickle 小部件。根本做不到。