ValueError: bpy_struct: item.attr = val: sequences of dimension 0 should contain 4 items, not 3

[npc203]

here's my full issue:

D:\Github\openstreetmap-heatmap>blender -b -P run_script.py
Blender 2.80 (sub 75) (hash f6cb5f54494e built 2019-07-29 09:44 AM)
Read prefs: C:\Users\HP\AppData\Roaming\Blender Foundation\Blender\2.80\config\u
serpref.blend
found bundled python: C:\Program Files\Blender Foundation\Blender\2.80\python
Info: Deleted 3 object(s)
Info: Deleted 3 object(s)
Number of points : 177
C:\Program Files\Blender Foundation\Blender\2.80\python\lib\site-packages\pyproj
\crs\crs.py:53: FutureWarning: '+init=:' syntax is deprecated.
':' is the preferred initialization method. When making the cha
nge, be mindful of axis order changes: https://pyproj4.github.io/pyproj/stable/g
otchas.html#axis-order-changes-in-proj-6
return _prepare_from_string(" ".join(pjargs))
C:\Program Files\Blender Foundation\Blender\2.80\python\lib\site-packages\pyproj
\crs\crs.py:294: FutureWarning: '+init=:' syntax is deprecated.
':' is the preferred initialization method. When making the ch
ange, be mindful of axis order changes: https://pyproj4.github.io/pyproj/stable/
gotchas.html#axis-order-changes-in-proj-6
projstring = _prepare_from_string(" ".join((projstring, projkwargs)))
Traceback (most recent call last):
File "", line 1, in
File "D:\Github\openstreetmap-heatmap\run_script.py", line 30, in
exec(compile(open(file).read(), scriptFile, 'exec'))
File "render_osm_data.py", line 179, in
heatmap_barplot(hist, colormap=cm.viridis)
File "render_osm_data.py", line 105, in heatmap_barplot
mat = utils.simple_material(color[:3])
File "D:\Github\openstreetmap-heatmap\utils.py", line 11, in simple_material
mat.diffuse_intensity = 0.9
AttributeError: 'Material' object has no attribute 'diffuse_intensity'

Blender quit

D:\Github\openstreetmap-heatmap>blender -b -P run_script.py
Blender 2.80 (sub 75) (hash f6cb5f54494e built 2019-07-29 09:44 AM)
Read prefs: C:\Users\HP\AppData\Roaming\Blender Foundation\Blender\2.80\config\u
serpref.blend
found bundled python: C:\Program Files\Blender Foundation\Blender\2.80\python
Info: Deleted 3 object(s)
Info: Deleted 3 object(s)
Number of points : 177
C:\Program Files\Blender Foundation\Blender\2.80\python\lib\site-packages\pyproj
\crs\crs.py:53: FutureWarning: '+init=:' syntax is deprecated.
':' is the preferred initialization method. When making the cha
nge, be mindful of axis order changes: https://pyproj4.github.io/pyproj/stable/g
otchas.html#axis-order-changes-in-proj-6
return _prepare_from_string(" ".join(pjargs))
C:\Program Files\Blender Foundation\Blender\2.80\python\lib\site-packages\pyproj
\crs\crs.py:294: FutureWarning: '+init=:' syntax is deprecated.
':' is the preferred initialization method. When making the ch
ange, be mindful of axis order changes: https://pyproj4.github.io/pyproj/stable/
gotchas.html#axis-order-changes-in-proj-6
projstring = _prepare_from_string(" ".join((projstring, projkwargs)))
Traceback (most recent call last):
File "", line 1, in
File "D:\Github\openstreetmap-heatmap\run_script.py", line 30, in
exec(compile(open(file).read(), scriptFile, 'exec'))
File "render_osm_data.py", line 179, in
heatmap_barplot(hist, colormap=cm.viridis)
File "render_osm_data.py", line 105, in heatmap_barplot
mat = utils.simple_material(color[:3])
File "D:\Github\openstreetmap-heatmap\utils.py", line 12, in simple_material
mat.diffuse_color = diffuse_color
ValueError: bpy_struct: item.attr = val: sequences of dimension 0 should contain
4 items, not 3

Blender quit

[aehrath-gretel]

I have a fix for this and Blender > 2.8 errors. I opened a PR for this: #3 you could give it a whirl.