详解python tkinter包获取本地绝对路径（以获取图片并展示）

import tkinter as tk 
import tkinter.filedialog
import cv2
 
def choose_file(): # 选择文件
  selectFileName = tk.filedialog.askopenfilename(title='选择文件') 
  e.set(selectFileName)
  
def show(e_entry): #显示图片
  img = cv2.imread(e_entry.get())
  cv2.imshow("PICTURE",img)
  cv2.waitKey(0)
 
def window(): 
  root = tk.Tk()
  root.geometry('650x450+150+100')
  root.title('test')
  root.resizable(False, False)
 
  global e
  e = tk.StringVar() #文本输入框
  e_entry = tk.Entry(root, width=68,textvariable=e)
  #e_entry.pack()
  
  #选择文件控件
  sumbit_btn = tk.Button(root,text="选择文件",bg='yellow',command = choose_file)
  sumbit_btn.pack()
  #展示文件控件
  show_btn = tk.Button(root,text= '查看图片',bg = 'blue',               command = lambda :show(e_entry))
  show_btn.pack()
 
  root.mainloop() 
    
 
window()