python - tkinter Python 中的 Entry 变量出现问题

Question

from tkinter import *

root = Tk()
root.geometry("800x650")
e = Entry(root, width=3, font=('Verdana', 30), justify='right')

a = b = c = e

a.place(relx=0.2, rely=0.5, anchor=CENTER)
b.place(relx=0.44, rely=0.5, anchor=CENTER)
c.place(relx=0.65, rely=0.5, anchor=CENTER)
root.mainloop()

为什么我看不到所有三个条目，它们在哪里？

但是当我这样做时:

a = Entry(root, width=3, font=('Verdana', 30), justify='right')
b = Entry(root, width=3, font=('Verdana', 30), justify='right')
c = Entry(root, width=3, font=('Verdana', 30), justify='right')

它有效...

Answer 1

尝试将“e”改为一个类，并单独声明您的框，a = b = e 给出的结果与您尝试的结果大致相同。

root = Tk()
root.geometry("800x650")

class MyEntry(Entry):
    def __init__(self, master=root):
        Entry.__init__(self, master=root)

        self.configure(width = 3, 
            font = ('Verdana', 30),
            justify = 'right')

a = MyEntry()
b = MyEntry()
c = MyEntry()

a.place(relx=0.2, rely=0.5, anchor=CENTER)
b.place(relx=0.44, rely=0.5, anchor=CENTER)
c.place(relx=0.65, rely=0.5, anchor=CENTER)
root.mainloop()