python 制作缩略图

import cv2   #导入opencv模块
from tkinter import *   #导入tkinter模块
from tkinter import ttk #tkinter最新的主题部件
from PIL import Image

#初始化模块
root = Tk()
root.title('Pt')
root.geometry('600x300')
#查找图片路径，成功则显示图片
def searchPicture():
    location = locOfPicture.get()
    img = cv2.imread(location)
    cv2.imshow("Image",img)

#生成缩略图
def setPicture():
    # 获取图片路径
    location = locOfPicture.get()
    # 对图片进行操作
    im = Image.open(location)
    im.thumbnail((int(heightOfPicture.get()),int(widthOfPicture.get())))
    im.save(nameOfImg.get(),'JPEG')


label1 = ttk.Label(root,text='选择图片')
label2 = ttk.Label(root,text='长:')
label3 = ttk.Label(root,text='宽:')
label4 = ttk.Label(root,text='文件名')

#存储输入框中输入的变量
locOfPicture = StringVar()
heightOfPicture= StringVar()
widthOfPicture = StringVar()
nameOfImg = StringVar()

entry1 = ttk.Entry(root,textvariable = locOfPicture,width=50)
entry2 = ttk.Entry(root,textvariable=heightOfPicture,width=10)
entry3 = ttk.Entry(root,textvariable=widthOfPicture,width=10)
entry4 = ttk.Entry(root,textvariable=nameOfImg,width=25)

button1 = ttk.Button(root,text='确定',command=searchPicture)
button2 = ttk.Button(root,text='确定生成',command=setPicture)

#进行界面布局
label1.grid(column=0,row=0)
entry1.grid(column=1,row=0,columnspan=3)
button1.grid(column=4,row=0)
label2.grid(column=0,row=1)
entry2.grid(column=1,row=1)
label3.grid(column=2,row=1)
entry3.grid(column=3,row=1)
entry4.grid(column=1,row=2,columnspan=2)
button2.grid(column=3,row=2)

root.mainloop()