py tkinter Questions about the option box

Problem: In the following code, the output is always PY_VAR0 PY_VAR1, what is the problem? I want to print the result of the selection in the radio box what do I need to change?

```python

import tkinter as tk


def imp():
    print(levelchoose,modechoose)

top = tk.Tk()
top.config(bg='#DEDEDE')
top.geometry('960x540')
#主要界面、字符
songs = tk.Frame(top,width=278,height=478,bd=1,bg='#B3B3B3',takefocus=False)
songs.place(x=32,y=33)
word1 = tk.Label(text='选择曲目',bg='#DEDEDE')
word1.place(x=139,y=10)

level = tk.Frame(top,width=278,height=220,bd=1,bg='#B3B3B3',takefocus=False)
level.place(x=352,y=33)
word2 = tk.Label(text='难度',bg='#DEDEDE')
word2.place(x=467,y=10)

mode = tk.Frame(top,width=278,height=230,bd=1,bg='#B3B3B3',takefocus=False)
mode.place(x=352,y=281)
word3 = tk.Label(text='模式',bg='#DEDEDE')
word3.place(x=467,y=255)

info = tk.Frame(top,width=278,height=180,bd=1,bg='#B3B3B3',takefocus=False)
info.place(x=658,y=33)
word4 = tk.Label(text='信息：还没做',bg='#b3b3b3')
word4.place(x=684,y=50)


#难度单选框
levelchoose = tk.StringVar()
levelchoose.set('1')
levelradio = tk.Radiobutton(level,variable=levelchoose,value='1',text='1',bg='#B3B3B3').place(x=10,y=10)
levelradio = tk.Radiobutton(level,variable=levelchoose,value='2',text='2',bg='#B3B3B3').place(x=10,y=30)
levelradio = tk.Radiobutton(level,variable=levelchoose,value='3',text='3',bg='#B3B3B3').place(x=10,y=50)
levelradio = tk.Radiobutton(level,variable=levelchoose,value='4',text='4',bg='#B3B3B3').place(x=10,y=70)
levelradio = tk.Radiobutton(level,variable=levelchoose,value='5',text='5',bg='#B3B3B3').place(x=10,y=90)

#模式单选框
modechoose = tk.StringVar()
modechoose.set('1')
moderadio = tk.Radiobutton(mode,variable=modechoose,value='1',text='转盘模式',bg='#B3B3B3').place(x=10,y=10)
moderadio = tk.Radiobutton(mode,variable=modechoose,value='2',text='磁带模式',bg='#B3B3B3').place(x=10,y=30)

#导入按钮
button = tk.Button(top,text="导入",width=171,height=83,command=imp).place(x=712,y=396)

top.mainloop()

```