How to Install and Use TkDnD with Python Tkinter on OSX?

Question

I\'ve spent some time to search for workable solution to do Drag and Drop behavior with Python Tkinter on OSX platform, and the most possible solution found is TkDnD library

Answer 1

This is an update from 2017, with a bit more detail, since Mac decided to make it impossible to write files to /System/Library. The following solution is also cross-platform, since I am currently writing an app for both Windows/Mac that uses TkDnD.

The following solution works with pyInstaller, and also with Mac OS 10.12 and Windows 7.

First, we need to get a path to where tkDnD is. By default, I place tkdnd2.8 folder next to main.py.

import sys, os
if getattr(sys, 'frozen', False):
    # If the application is run as a bundle, the pyInstaller bootloader
    # extends the sys module by a flag frozen=True and sets the app 
    # path into variable _MEIPASS'.
    application_path = sys._MEIPASS
else:
    application_path = os.path.dirname(os.path.abspath(__file__))

TK_DND_PATH = os.path.join(application_path,'tkdnd2.8')

Note that Ellis's solution works Tcl directly, modifying the path. Make sure that SOMEWHERE, you have something along this gist:

import tkinter as tk
root = tk.Tk()
root.eval('lappend auto_path {' + TK_DND_PATH + '}')

After this, whenever you happen to actually import tkDnD, it will find it. I used DnD.py. Without the 'lappend auto_path' command, my program could never find tkDnD.

https://mail.python.org/pipermail/tkinter-discuss/2005-July/000476.html