Python:Exception in Tkinter callback错误

Question

自学小白，这段代码之前没什么问题，最近运行突然报错，不知道如何解决，求大腿解答。

报错为：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\ASUS\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 1883, in __call__
    return self.func(*args)
  File "E:/pythonProject2/自建窗口.py", line 50, in fanyi
    d_list = list(set(a_list) ^ set(b_list))
TypeError: 'float' object is not iterable

import requests
from requests.exceptions import RequestException
import tkinter as tk
class Translate():
    def __init__(self):
        self.window = tk.Tk()
        self.window.title("制作")
        self.window.resizable(0,0)
        self.input = tk.Entry(self.window, width=80)
        self.info = tk.Text(self.window, height=18)

        self.t_button = tk.Button(self.window, text='制作', relief=tk.RAISED, width=8, height=1, command=self.fanyi)

        self.c_button1 = tk.Button(self.window, text='清空输入', relief=tk.RAISED, width=8, height=1, command=self.cle_e)

        self.c_button2 = tk.Button(self.window, text='清空输出', relief=tk.RAISED,width=8, height=1, command=self.cle)


    def gui_arrang(self):

        self.input.grid(row=0,sticky="W",padx=1)
        self.info.grid(row=1)
        self.t_button.grid(row=0,column=1,padx=2)
        self.c_button1.grid(row=0, column=2, padx=2)
        self.c_button2.grid(row=0,column=3,padx=2)


    def fanyi(self):

        original_str = self.input.get()



        if __name__ == '__main__':
            a_list = [101, 102, 103, 104, 105, 106, 107, 108, 111, 112, 113, 114, 115, 201, 202, 203, 204, 205, 206,
                      207, 208, 211, 212, 213, 214, 215, 216, 301, 302, 303, 304, 305, 306, 307, 308, 311, 312, 313,
                      314, 315, 316, 401, 402, 403, 404, 405, 406, 407, 408, 505, 506, 507, 508, 515, 516, 411, 412,
                      413, 414, 415, 416, 511, 512, 513, 514]

            b_list = eval(original_str)

            c_list = [101, 102, 103, 104, 105, 106, 107, 108, 111, 112, 113, 114, 115, 201, 202, 203, 204, 205, 206,
                      207, 208, 211, 212, 213, 214, 215, 216, 301, 302, 303, 304, 305, 306, 307, 308, 311, 312, 313,
                      314, 315, 316, 401, 402, 403, 404, 405, 406, 407, 408, 505, 506, 507, 508, 515, 516]

            d_list = list(set(a_list) ^ set(b_list))

            ret_list = list((set(c_list).union(set(d_list))) ^ (set(c_list) ^ set(d_list)))

            ret_list.sort()




            self.info.delete(1.0, "end")
            self.info.insert('end',ret_list)

    def cle(self):

        self.info.delete(1.0,"end")

    def cle_e(self):

        self.input.delete(0,"end")

def main():
    t = Translate()
    t.gui_arrang()
    tk.mainloop()

if __name__ == '__main__':
    main()

Answer 1

输入框中不能只输入一个数，b_list = eval(original_str)会把安变换为一个浮点数，参数集合运行，这时会报错；要输入1 个数，就要加上逗号，使其成为元组形式，参与集合运算。