如何在Tkinter中获取所选格式？

如何解决如何在Tkinter中获取所选格式？

我想做一个按钮将图片保存在address_txt给我的地址中，但是问题是address_txt没有给我提供选定的格式，它只有名字。如何获得所选格式？

import tkinter
from tkinter import *
from tkinter import messageBox
from tkinter import filedialog
from PIL import ImageTk,Image
import PIL
from tkinter import ttk

root = Tk()

def save_1():
    address_txt = filedialog.asksaveasfilename(title="save",filetypes = (("All files","*"),("PNG file","*.png"),("JPG file","*.jpg"),("GIF file","*.gif")))
    print(address_txt)

btn_save = Button(root,text="Save",bg = "light blue",font=("Times New Roman",17),command=save_1)
btn_save.pack()

root.mainloop()

解决方法

尝试在typevariable中传递filedialog.asksaveasfilename。以下示例：

from tkinter import *
from tkinter import filedialog
root = Tk()

def save_1():
    address_txt = filedialog.asksaveasfilename(title="save",filetypes = (("Alls","*"),("png","*.png"),("jpg","*.jpg"),("gif","*.gif")),typevariable=extension_name)
    print("The path is:",address_txt)
    print("The extension is:",extension_name.get())

extension_name = StringVar()
btn_save = Button(root,text="Save",bg = "light blue",font=("Times New Roman",17),command=save_1)
btn_save.pack()

root.mainloop()

示例输出：

,

如果知道扩展名，则可以使用defaultextension参数：

file = filedialog.asksaveasfile(mode='w',defaultextension=".png",filetypes=(("PNG file",("All Files","*.*") ))