Some proposed modifications to tktextext.py in order to support copy/paste of images

tktextext.py

# Example URL: https://i.imgur.com/TqN0Be5.png
# This let's you copy/paste a URL into your source code (png, bmp anyway)

import base64
# This is for copying HTTP images
from urllib.request import urlopen
...

class EnhancedText(TweakableText):
    def __init__(self, master=None, cnf={}, **kw):
        ...
        # Need to store refs to the images, or they disappear immediately
        # Maps unique string names to the PhotoImage instances
        self._images = []
        self._IMAGE_COUNTER = 0
        ...
    
    def _bind_editing_aids(self):
        ...
        # Bind paste functionality
        self.bind("<<Paste>>", if_not_readonly(self.paste_image), True)
        ...
    ...

    def paste_image(self, event):
        '''
        Embeds images in the text
        '''
        
        # Retrieve string URL from clipboard
        image_url = self.clipboard_get()
        # HTTP GET the contents of the URL
        try:
            image_data = urlopen(image_url).read()
        except ValueError:
            return
        # Convert to a base64 representation - might want to cache to file
        # instead, but this is a simple version.
        image_b64 = base64.encodestring(image_data)
        # Load base64 rep into a Tkinter PhotoImage
        try:
            image_tk = tk.PhotoImage(data = image_b64)
        except ValueError:
            return
        # Make a unique name for this URL so we can find it later
        unique_name = str(self._IMAGE_COUNTER)+'|'+image_url
        self._IMAGE_COUNTER += 1
        # Keep track of the data internally for future lookups
        self._images.append((image_tk, unique_name, image_url))
        # Actually create the image within the Text editor
        self.image_create("insert", image=image_tk, name=unique_name)
        # After the event is done, we restore the URL to the clipboard in
        #   case the user wants to use it again.
        self.after(1, lambda: self.clipboard_append(image_url))
        # Clear the clipboard to prevent the URL from appearing.
        self.clipboard_clear()
    
    def get_images(self):
        '''
        Processes a list of the images embedded in the text, their URLs as
        strings, and their positions within the text.
        '''
        for image_tk, unique_name, image_url in self._images:
            # TODO: do some sanity check to make sure the name exists, since
            #       it could have been deleted
            line_column_position = self.index(unique_name)
            # With the line/column position and the image_url, you could work
            # backwards through the Text editor's contents to inject the URLS
            # into their right places. This would need to be done whenever
            # you want to get access to the contents of the editor.