Gtk namespace error when executing kfit.py on Windows 10

[rhroberts]

I've tested the following with Windows 10 and Anaconda's python3 distribution. After installing conda and opening up a conda prompt:

• Create a conda env

conda create -n kfit python=3.7
conda activate kfit

• Install dependencies

conda install numpy matplotlib pandas pycairo
conda install -c conda-forge pygobject
pip install lmfit

• Download and unzip kfit source code
• Navigate to the project root
• Run python kfit/kfit.py

Currently, this produces the following error:

Traceback (most recent call last): File "C:\Users\rhrob\Anaconda3\envs\kfit\lib\site-packages\matplotlib\backends\backend_gtk3.py", line 25, in gi.require_version("Gtk", "3.0") File "C:\Users\rhrob\Anaconda3\envs\kfit\lib\site-packages\gi_init_.py", line 129, in require_version raise ValueError('Namespace %s not available' % namespace) ValueError: Namespace Gtk not available
The above exception was the direct cause of the following exception:
Traceback (most recent call last): File "kfit.py", line 7, in from matplotlib.backends.backend_gtk3cairo import ( File "C:\Users\rhrob\Anaconda3\envs\kfit\lib\site-packages\matplotlib\backends\backend_gtk3cairo.py", line 1, in from . import backend_cairo, backend_gtk3 File "C:\Users\rhrob\Anaconda3\envs\kfit\lib\site-packages\matplotlib\backends\backend_gtk3.py", line 29, in raise ImportError from e ImportError