pythonのtkinterのradiobuttonで選択した項目のvalue値を関数の変数にしようとするとエラーが出る

Question

Tkinterでマップ選択画面にradiobuttonを配置して選んだマップのframeに飛べるシステムを作っています。しかしエラーが出てしまってうまく変数にradiobuttonのvalue値を組み込むことができません。

# tkinterのインポート
import tkinter as tk
import tkinter.ttk as ttk
import time
import program as pg
import talking as tg
import keyboard
import pygame

if __name__ == "__main__":
    #メインウィンドウの設定
    root = tk.Tk()
    root.attributes('-fullscreen', True)
    root.bind('<Escape>', lambda e: root.destroy())
    root.geometry("1920x1200")
    root.configure(bg='black')
    root.grid_rowconfigure(0, weight=1)
    root.grid_columnconfigure(0, weight=1)

    #タイトルウィンドウ設置
    frame = tk.Frame(root, bg='black')
    frame.grid(row=0, column=0, sticky="nsew", pady=20)

    #マップ画面
    main_map = tk.Frame(root, bg='black')
    main_map.grid(row=0, column=0, sticky="nsew", pady=20)
    map_img = tk.PhotoImage(file='map.png')
    map_img_label = tk.Label(main_map, image=map_img, background='black')
    map_img_label.grid()

    map_radio = tk.IntVar()
    map_radio.set(0)
    map_1 = tk.Radiobutton(map_img_label, value=0, variable=map_radio)
    map_1.place(x=500, y=600)
    map_2 = tk.Radiobutton(map_img_label, value=1, variable=map_radio)
    map_2.place(x=1000, y=700)
    map_3 = tk.Radiobutton(map_img_label, value=2, variable=map_radio)
    map_3.place(x=1300, y=500)
    map_select_button = tk.Button(main_map, text='選択', command=lambda:pg.change_map(map_radio))
    map_select_button.place(x=1800, y=1000)

    #ろとの塔
    roto = tk.Frame(root, bg='black')
    roto.grid(row=0, column=0, sticky="nsew", pady=20)
    talk_label = tk.Label(roto, text = tg.roto_tell[pg.roto_x])
    talk_label.place(x=0, y=800, width=1920, height=300)

    #勇者の集落
    yuusha = tk.Frame(root, bg='black')
    yuusha.grid(row=0, column=0, sticky="nsew", pady=20)
    talk_label = tk.Label(yuusha, text = tg.yuusha_tell[pg.yuusha_x])
    talk_label.place(x=0, y=800, width=1920, height=300)

    #天空の洞窟
    tenku = tk.Frame(root, bg='black')
    tenku.grid(row=0, column=0, sticky="nsew", pady=20)
    talk_label = tk.Label(tenku, text = tg.tenku_tell[pg.tenku_x])
    talk_label.place(x=0, y=800, width=1920, height=300)

    # frameを前面にする
    frame.tkraise()

    root.mainloop()

import talking as tg
import time
import tkinter as tk
import tkinter.ttk as ttk
import main
import pygame

map_no = [roto, yuusha, tenku]

def change_map(var):
    map_value= var.get()
    map_no[map_value].tkraise()

 map_no[map_value].tkraise()
AttributeError: 'str' object has no attribute 'tkraise'