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()

Why can't I see all three entries, where are they?

But when I do this:

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')

it works...

Answer 1

尝试将“ e”设为类，并分别声明框，a = b = e给出的结果与您尝试的结果相同。

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()

Answer 2

为什么我看不到所有三个条目，它们在哪里？

您没有看到三个条目，因为您没有创建三个条目。当您执行a = b = c = e时，您要为e所引用的同一对象分配三个新名称，而不是在创建新的窗口小部件。 a，b，c和e都引用内存中的同一对象。

Having trouble with Entry variables in tkinter Python

2 个答案: