Tkinter OptionMenu 不能在函数中使用 .get

Question

我正在写一些代码，当 optionMenu 改变时我需要一个变量来改变下面是我的一些代码

#!/user
# -*- coding: utf-8 -*-

import locale
import Tkinter as Tk

root = Tk.Tk()
root.title("My Tax Calculator")
root.geometry("700x225")

def getStudentLoan():
    global StudentLoan
    StudentLoan = StudentLoanLi.get()

LeftFrame = Tk.Frame(root, width=300, height=200, pady=3)

Placeholder2 = Tk.Label(LeftFrame, text="")
Placeholder2.grid(row=2, column=1)

StudentLoanOp = Tk.StringVar()
StudentLoanOp.set("No")

StudentLoanLi = Tk.OptionMenu(Placeholder2, StudentLoanOp, "No", "Plan 1", "Plan 2", command=lambda _: getStudentLoan())
StudentLoanLi.grid(row=2, column=1)

Tk.mainloop()

这在 pycharm 编辑器中不起作用我收到此错误 "unresolved attribute reference error on 'get' for Class 'OptionMenu'"

当我执行代码并尝试更改 OptionMenu 时，我在控制台中收到此错误

"学生贷款=StudentLoanLi.get() AttributeError：OptionMenu 实例没有属性 'get'"

任何帮助将不胜感激

Answer 1

OptionMenuclass没有get方法。从 OptionMenu 中获取所选项目的正确方法是使用 OptionMenu 的 StringVar 的 get 方法，您将其命名为 StudentLoanOp:

def getStudentLoan():
    global StudentLoan
    StudentLoan = StudentLoanOp.get()

Tkinter OptionMenu 不能在函数中使用 .get

Tkinter OptionMenu cant use .get in a function

python

tkinter

optionmenu

tkinter.optionmenu