tkPDFViewer只工作一次然后抛出:图像"pyimage1“不存在

Question

# Importing tkinter to make gui in python
from tkinter import*
  
# Importing tkPDFViewer to place pdf file in gui.
# In tkPDFViewer library there is
# an tkPDFViewer module. That I have imported as pdf
from tkPDFViewer import tkPDFViewer as pdf
  
v2= NONE
# Initializing tk
root = Tk()
  
# Set the width and height of our root window.
root.geometry("550x750")
  
# creating object of ShowPdf from tkPDFViewer.
v1 = pdf.ShowPdf()
  
# Adding pdf location and width and height.
v2 = v1.pdf_view(root,
                 pdf_location = r"YourPdfFile.pdf", 
                 width = 50, height = 100)
  
# Placing Pdf in my gui.
v2.pack()
root.mainloop()

如何复制bug：

1. 运行上述代码一次，它将在窗口中显示.PDF。
2. 关闭窗口。
3. 再次运行代码
4. ，然后将得到以下问题：

< code >G 210

。

Exception in thread Thread-10:
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\threading.py", line 973, in _bootstrap_inner
    self.run()
  File "C:\ProgramData\Anaconda3\lib\threading.py", line 910, in run
    self._target(*self._args, **self._kwargs)
  File "C:\ProgramData\Anaconda3\lib\site-packages\tkpdfviewer-0.1-py3.9.egg\tkPDFViewer\tkPDFViewer.py", line 61, in add_img
  File "C:\ProgramData\Anaconda3\lib\tkinter\__init__.py", line 3728, in image_create
    return self.tk.call(
_tkinter.TclError: image "pyimage1" doesn't exist

有人知道我怎么解决这个问题吗？

Answer 1

tkPDFViewer使用类变量img_object_li (类型list)存储从PDF文件中提取的图像。在spyder中执行脚本时，即使关闭tkinter窗口，类tkPDFViewer的实例仍然存在于spyder内核中。

因此，下一次执行脚本时，前面的映像实例仍然存储在类变量img_object_li中，并且它们将被再次使用和显示，这会引发异常，因为以前的Tk()实例已被销毁。

要解决这个问题，类变量img_object_li在加载PDF文件之前应该是清楚的：

# Importing tkinter to make gui in python
from tkinter import*
  
# Importing tkPDFViewer to place pdf file in gui.
# In tkPDFViewer library there is
# an tkPDFViewer module. That I have imported as pdf
from tkPDFViewer import tkPDFViewer as pdf
  
v2= NONE
# Initializing tk
root = Tk()
  
# Set the width and height of our root window.
root.geometry("550x750")
  
# creating object of ShowPdf from tkPDFViewer.
v1 = pdf.ShowPdf()

### clear the image list ###
v1.img_object_li.clear()
  
# Adding pdf location and width and height.
v2 = v1.pdf_view(root,
                 pdf_location = r"test.pdf", 
                 width = 50, height = 100)
  
# Placing Pdf in my gui.
v2.pack()
root.mainloop()