PIL 有 ImageTk KeyError <pil.imagetk.photoimage object at 0x0000025a48201690></pil.imagetk.photoimage>

Question

我正在制作一个照片显示应用程序，以替换默认的 windows。 我正在使用 Pillow 和 ImageTk 来显示它们，但是我的问题是我正在尝试使用一些代码将图像旋转到不同的方向。 当我运行代码时，我遇到了这个问题：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\james\AppData\Local\Programs\Python\Python310\lib\tkinter\__init__.py", line 1921, in __call__
    return self.func(*args)
  File "c:\Users\james\OneDrive\Documents\Coding\Python\Apps for Computer\photo_viewer.py", line 51, in rotate_left
    newimg = ImageTk.PhotoImage(img, size=(img.width(), img.height()))
  File "C:\Users\james\AppData\Local\Programs\Python\Python310\lib\site-packages\PIL\ImageTk.py", line 108, in __init__
    mode = Image.getmodebase(mode)
  File "C:\Users\james\AppData\Local\Programs\Python\Python310\lib\site-packages\PIL\Image.py", line 267, in getmodebase
    return ImageMode.getmode(mode).basemode
  File "C:\Users\james\AppData\Local\Programs\Python\Python310\lib\site-packages\PIL\ImageMode.py", line 74, in getmode
    return _modes[mode]
KeyError: <PIL.ImageTk.PhotoImage object at 0x00000277E66616C0>

因此，这是代码的改进版本，向您展示它是如何工作的：

import tkinter
from tkinter.filedialog import askopenfile
from PIL import Image, ImageTk

img_exten = r"*.png  *.bmp  *jpeg  *.bmp  *.ico  *.gif  *.jpg"
filetypes = (
    ("Image Files", img_exten),
    ("All Files", "*.*")
)

selected_image = ""
img = ""

root = tkinter.Tk()


def open_image():
    global selected_image
    global img
    try:
        selected_image = askopenfile(title="Open Image", filetypes=filetypes).name
        root.title(selected_image + " - Photos")
        img_temp = Image.open(selected_image)
        ar = img_temp.width / img_temp.height
        height = 540
        width = int(height * ar)
        root.geometry(str(width + 30) + "x" + str(height + 50))
        img_temp = img_temp.resize((width, height), Image.ANTIALIAS)
        img = ImageTk.PhotoImage(img_temp)
        image_area.create_image(1, 1, image=img, anchor="nw")
    except Exception as e:
        print(e)


def rotate_left():
    global img
    newimg = ImageTk.PhotoImage(img, size=(img.width(), img.height()))
    for x in range(img.width()):
        for y in range(img.height()):
            rgb = '#%02x%02x%02x' % img.get(x, y)
            newimg.put(rgb, (x, y))
    newimg.put(rgb (img.height() - y, x))
    img = newimg
    image_area.create_image(1, 1, image=img, anchor="nw")


image_area = tkinter.Canvas(root, width=960, height=540)
image_area.grid(column=1, row=1)


menu_bar = tkinter.Menu(root)
filemenu = tkinter.Menu(menu_bar, tearoff=0)
filemenu.add_command(label="Open", command=open_image)
filemenu.add_command(label="Close", command=close_image)
menu_bar.add_cascade(label="File", menu=filemenu)

toolsmenu = tkinter.Menu(menu_bar, tearoff=0)
toolsmenu.add_command(label="Rotate left", command=rotate_left)
menu_bar.add_cascade(label="Tools", menu=toolsmenu)

root.config(menu=menu_bar)
tkinter.mainloop()

• 詹姆士

Answer 1

您的代码在任何地方都没有img_temp.rotate ！

在您的 rotate_left function 中尝试制作img_temp的副本然后旋转它。 这个代码片段对我有用。

def rotate_left():
    global img
    # pass original image open reference
    global img_temp 
    # make a copy
    extra = img_temp.copy()
    # rotate it
    new = extra.rotate(45, expand = False)
    # self.new.save(new_picture_name)
    # make image
    newimg = ImageTk.PhotoImage(new, size=(img.width(), img.height()))
    # update old image
    img = newimg
    image_area.create_image(1, 1, image=img, anchor="nw")
    # update old image open reference
    img_temp = new