[Solved]-OSError: cannot load library 'gobject-2.0': error 0x7e


Starting from Python 3.8 DLL dependencies for extension modules and DLLs loaded with ctypes on Windows are now resolved more securely. Only the system paths, the directory containing the DLL or PYD file, and directories added with add_dll_directory() are searched for load-time dependencies. Specifically, PATH and the current working directory are no longer used, and modifications to these will no longer have any effect on normal DLL resolution.

If you followed the installation guide from the official documentation then the following example works.

import os

os.add_dll_directory(r"C:\Program Files\GTK3-Runtime Win64\bin")

from weasyprint import HTML


In essence you need to call add_dll_directory() before interacting with WeasyPrint.



I got desperate and decided to install the library gtk2 C:\Program Files (x86)\GTK2\lib\ and specify the first in the PATH list. It worked… But my OS – win 10 x64. Why the library GTK3 refused to work, I do not know.


For MacOS this helped. Bascially you have to create few links.

sudo ln -s /opt/homebrew/opt/glib/lib/libgobject-2.0.0.dylib
sudo ln -s
sudo ln -s
sudo ln -s
sudo ln -s




For me this was about env variables not set correctly.

I had to add GTK3 as a System env variable in Windows for my project to work (Windows 10).


Solution that worked for me:

  1. Following weasyprint usage on Windows, download and install GTK.
  2. Add GTK at start of python (in this case python manage.py runserver):
# insert the GTK3 Runtime folder at the beginning. Can be bin or lib, depending on path you choose while installing.
GTK_FOLDER = r'C:\Program Files\GTK3-Runtime Win64\bin'
os.environ['PATH'] = GTK_FOLDER + os.pathsep + os.environ.get('PATH', '')


I made a django website for windows 10 with the weasyprint library. Also installed GTK+ for Windows Runtime Environment (version 3). The same errors were thrown.

I tried to swap paths in path, updated windows to 11, but it didn’t help.
Then i pasted ‘sitecustomize.py’ like Tontyna https://github.com/Kozea/WeasyPrint/issues/971#issuecomment-544195744 to the virtual environment folder ‘/Lib/site-packages’,

another error occurred: Fontconfig error: Cannot load default config file.

It turned out that the ‘C:\Users<User>\anaconda3\fontconfig.dll’ library is being loaded.

In the file ‘sitecustomize.py’ I changed the line:
os.environ['PATH'] = GTK_FOLDER + os.pathsep + os.environ.get('PATH', '')
to the line:
os.environ['PATH'] = GTK_FOLDER
and it WORKS

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