Tkinter OptionMenu 不能在函数中使用 .get

Question

I'm writing some code and i need a variable to change when the optionMenu is changed here is some of my code below

#!/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()

This will not work in pycharm editor i get this error "unresolved attribute reference error on 'get' for Class 'OptionMenu'"

and when i execute the code and try and change the OptionMenu i get this error in the console

"StudentLoan = StudentLoanLi.get() AttributeError: OptionMenu instance has no attribute 'get'"

any help will greatly appreciated

Answer 1

The OptionMenu class has no get method. The correct way to get the selected item from an OptionMenu is to use the get method of the OptionMenu's StringVar , which you named StudentLoanOp :

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