How to change Python version for GRASS in Windows

Question

I'm using GRASS GIS 7.0.3, the default python version is python2.7. I need python3.5 for my own module. After I edit the 'etc/env.bat' file to change GRASS_PYTHON and PYTHONHOME to the location of my new python .exe file and the new python directory. Then I run GRASS GIS, but I got the following error:

File "C:\Program Files\GRASS GIS 7.0.3\etc\grass70.py", line 251 os.makedir(tmpdir, 0700) SyntaxError: invalid token

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Am I do it in the right way?

• PolyGeo: Please always include errors as text rather than just pictures of errors. That way they are available to future searches.

Answer 1

From REQUIREMENTS to compile GRASS GIS 7

Python>= 2.6 (for temporal framework, scripts, wxGUI, and ctypes interface) Note: Python 3 support is still in development

and

• [GRASS GIS] #2708: Run GRASS with Python3
• Exception using PyGRASS: "No module named 'core'"

• Rui Wang: According to the last link, I modify the init.py "import core" to "import .core". I got error "no module named builtin". I think the idea is GRASS haven't support Python3 yet.
• gene: yes ---------------