AttributeError: ‘PhotoImage‘ object has no attribute ‘_PhotoImage__photo‘ (原因1)

在tkinter中使用PIL显示图片时，提示AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'，最后发现原因是应为PhotoImage本质上是调用TKinter的PhotoImage构造函数，所以在使用之前需要先初始化Tk()

为什么说是原因1呢，因为导致AttributeError的原因有很多，后续遇到会在记录下来的。

示例

错误：

import tkinter as tk
from PIL import ImageTk,Image

p = Image.open(r"E:\项目更新\hypergryphTool\sc\zhyd.png")

imager = ImageTk.PhotoImage(p)


root = tk.Tk()


a = tk.Label(root,image=imager)
a.pack()

root.mainloop()

Traceback (most recent call last):
  File "C:/Users/admin/PycharmProjects/pythonProject/main.py", line 7, in 
    imager = ImageTk.PhotoImage(p)
  File "C:\Users\admin\AppData\Local\Programs\Python\Python38\lib\site-packages\PIL\ImageTk.py", line 112, in __init__
    self.__photo = tkinter.PhotoImage(**kw)
  File "C:\Users\admin\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 4064, in __init__
    Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "C:\Users\admin\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 3997, in __init__
    master = _get_default_root('create image')
  File "C:\Users\admin\AppData\Local\Programs\Python\Python38\lib\tkinter\__init__.py", line 297, in _get_default_root
    raise RuntimeError(f"Too early to {what}: no default root window")
RuntimeError: Too early to create image: no default root window
Exception ignored in: 
Traceback (most recent call last):
  File "C:\Users\admin\AppData\Local\Programs\Python\Python38\lib\site-packages\PIL\ImageTk.py", line 118, in __del__
    name = self.__photo.name
AttributeError: 'PhotoImage' object has no attribute '_PhotoImage__photo'

Process finished with exit code 1

正确写法：

import tkinter as tk
from PIL import ImageTk,Image

root = tk.Tk()
p = Image.open(r"E:\项目更新\hypergryphTool\sc\zhyd.png")

imager = ImageTk.PhotoImage(p)
a = tk.Label(root,image=imager)
a.pack()

root.mainloop()

结果：