tkinter doesn't open image via function

问题

Tkinter doesn't open the image. We can ask the opening incorrectly, we need help. I need it to open the image through the menu. be sure to use pil, as the image can be anything. There are no errors in the syntax. Thank you = )

from tkinter import Tk, Frame, Menu, Canvas, PhotoImage
import easygui
from PIL import Image, ImageFilter, ImageTk

def input_file():
    a = easygui.fileopenbox(filetypes=["*.jpg"])
    original = Image.open(a)
    original = original.resize((799, 799), Image.ANTIALIAS)
    photoimg = ImageTk.PhotoImage(original)
    canvas = Canvas(root, width=799, height=799)
    imagesprite = canvas.create_image(10, 10,anchor='nw', image=photoimg)
    canvas.pack()
    return (imagesprite)

root = Tk()
root.title("Sputnikeca")
#root.iconbitmap('путь к иконке')
root.geometry("800x800+0+0")

my_menu = Menu(root)
root.config(menu=my_menu)

# Create a menu item

file_menu = Menu(my_menu)
my_menu.add_cascade(label = "Файл", menu=file_menu)
file_menu.add_command(label = "Импорт...", command=input_file())
file_menu.add_separator()
file_menu.add_command(label = "Выход", command=root.quit)

root.mainloop()

回答1:

Here is what you have to do to solve the issue:

def input_file():
    global photoimg #keeping a reference
    a = easygui.fileopenbox(filetypes=["*.jpg"])
    original = Image.open(a).resize((799, 799), Image.ANTIALIAS) #calling it all in one line
    photoimg = ImageTk.PhotoImage(original)
    canvas = Canvas(root, width=799, height=799)
    imagesprite = canvas.create_image(10, 10,anchor='nw', image=photoimg)
    canvas.pack()
    return imagesprite

and then later remove the () around your function:

file_menu.add_command(label = "Импорт...", command=input_file)

What is being done?

• In the first set of code im keeping a reference to the image so the image is not garbage collected by python. You can do so either by saying imagesprite.image = photoimg or global photoimg on top of the function. I also resized the image in the same line that I opened the image, to reduce codes.

• And in the second set of codes, im just removing () so that the function is not called(invoked) before choosing the menu item.

• And also tkinter itself has a filedialogbox that works like your easygui.fileopenbox(filetypes=["*.jpg"]), read some docs here

  from tkinter import filedialog
  
  a = filedialog.askopenfilename(title='Choose a file',initialdir='C:/',filetypes=(('All Files','*.*'),("JPEG 
  Files",'*.jpeg')))
  

Hope this helped you solve the error, do let me know if any doubts.

Cheers

回答2:

If I am not mistaken, your menu opens as soon as you run the application, not when you click the import button.

It's because you need to pass the callback to the add_command, but you're calling the method instead

file_menu.add_command(label = "Import...", command=input_file())

Remove the () from input_file(). just pass input_file. it will not call the method directly anymore.

file_menu.add_command(label = "Import...", command=input_file)

来源：https://stackoverflow.com/questions/63966028/tkinter-doesnt-open-image-via-function