Spyder 4.2.1 - erroneous missing rtree dependency

I just installed spyder 4.2.1 (conda-forge) into a conda environment running Python 3.7.9. When I start spyder, a window pops up and states that a dependency is missing, namely rtree >=0.8.3.

However, rtree 0.9.5 is installed.

# Name                    Version                   Build  Channel
rtree                     0.9.5            py37h13cc57e_0    conda-forge

Removing/reinstalling rtree and spyder doesn’t stop the warning. Is this a bug, or is there something wrong with my environment?

[Samk19]

Got few solutions FOR LINUX (tested and worked): sudo apt install libspatialindex-dev FOR MAC: brew install spatialindex

still not sure if its a permanent fix or not

after using above command (i.e linux one)…spyder rtree error message gone rtree v0.9.4 is recognized by spyder

[manfred2020]

yes, version 0.9.7.

but… i had a completely different experience a few days ago:

i had some problems with a script that uses geopandas. error message was, that “spatialindex_c-64.dll” could not be found (“OSError: could not find or load spatialindex_c-64.dll”). (my script worked all the weeks before, i don’t know what happened).

so i searched the internet and one tipp was to copy the dll file (which existed in folder “…\anaconda3\Library\bin”) to the folder “…\anaconda3\envs\MyEnvironmentName\Lib\site-packages\rtree”.

since then everything worked as before, my geopandas script works and spyder 4.2.1 works, no more rtree message.

what’s your opinion on that?

to me it seems that updating to spyder 4.2.1 caused the geopandas script error message (script worked before the update).