TkDnD Error: Unable to load tkdnd library (_tkinter.TclError: can't find package tkdnd)

Question

I am currently working on MacOs Catalina 10.15.6 with Python 3.8 and Tcl/Tk 8.6. As suggested in here , I donwloaded both the Tk extension tkdnd2.8 from https://sourceforge.net/projects/tkdnd/ and the Python wrapper TkinterDnD2 from https://sourceforge.net/projects/tkinterdnd/ , and then I copied the tkdnd2.8 directory to /Library/Tcl and the TkinterDnD2 directory to /Library/Frameworks/Python.framework/Versions/.../lib/python/site-packages .

After that, when trying to execute the following simple code:

from TkinterDnD2 import *
import tkinter as tk
root = TkinterDnD.Tk()

It gives me the error:

Traceback (most recent call last):
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 39, in _require
        TkdndVersion = tkroot.tk.call('package', 'require', 'tkdnd')
_tkinter.TclError: can't find package tkdnd

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
    File "/Users/Administrador/Desktop/tkdnd_test.py", line 3, in <module>
        root = TkinterDnD.Tk()
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 271, in __init__
        self.TkdndVersion = _require(self)
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 41, in _require
        raise RuntimeError('Unable to load tkdnd library.')
RuntimeError: Unable to load tkdnd library.

Since tkdnd was not automatically being found/loaded (renaming the tkdnd2.8 folder to tkdnd didn't work either), I tried to manually specify the library path as suggested by @Ellis Shen and @aong152. I copied the tkdnd2.8 folder next to my tkdnd_test.py file. Unfortunately, when running the following code:

from TkinterDnD2 import *
import tkinter as tk
import sys, os

print(os.environ.get('TKDND_LIBRARY'))
application_path = os.path.dirname(os.path.abspath(__file__))
TK_DND_PATH = os.path.join(application_path,'tkdnd2.8')
os.environ['TKDND_LIBRARY'] = TK_DND_PATH
print(os.environ.get('TKDND_LIBRARY'))

root = TkinterDnD.Tk()

The same error is displayed (before that, the tkdnd path is printed):

None
/Users/Administrador/Desktop/tkdnd2.8
Traceback (most recent call last):
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 39, in _require
        TkdndVersion = tkroot.tk.call('package', 'require', 'tkdnd')
_tkinter.TclError: can't find package tkdnd

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
    File "/Users/Administrador/Desktop/tkdnd_test.py", line 11, in <module>
        root = TkinterDnD.Tk()
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 271, in __init__
        self.TkdndVersion = _require(self)
    File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/TkinterDnD2/TkinterDnD.py", line 41, in _require
        raise RuntimeError('Unable to load tkdnd library.')
RuntimeError: Unable to load tkdnd library.

I feel like I am missing something here, but I've spent a lot of time searching similar experiences and haven't been able to find a solution. Any help will be much appreciated.

Answer 1

Solved! The folder where you should place the tkdnd library is /Library/Frameworks/Python.framework/Versions/.../lib/ . Placing the lib on /Library/Tcl doesn't work for Catalina. I recommend you to install the newest tkdnd version (currently 2.9.3) available here .

Answer 2

I've built it and upload it to pypi

you can now just do pip install tkinterdnd2 and it should work.

import is tkinterdnd2 and not Tkinterdnd2