OSError: Could not find lib geos_c.dll or load any of its variants [].

Yennyffer Duran

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May 19, 2021, 10:28:45 AM5/19/21

to thonny

Hello eveyone,

I'm running Thonny on Windows 7 64 bits OS and I installed the arcade library , but when I try to run an example from the arcade libray I get the following errors:

What can I do to solve this??

Traceback (most recent call last):

File "D:\Users\duranys\AppData\Local\thonny-DURANYS\starting_template.py", line 8, in <module>

import arcade

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\arcade\__init__.py", line 194, in <module>

from .geometry import are_polygons_intersecting

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\arcade\geometry.py", line 4, in <module>

from shapely import speedups # type: ignore

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\speedups\__init__.py", line 4, in <module>

from shapely.geometry import linestring, polygon

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\geometry\__init__.py", line 4, in <module>

from .base import CAP_STYLE, JOIN_STYLE

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\geometry\base.py", line 19, in <module>

from shapely.coords import CoordinateSequence

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\coords.py", line 8, in <module>

from shapely.geos import lgeos

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\geos.py", line 169, in <module>

_lgeos = load_dll("geos_c.dll")

File "D:\Users\duranys\AppData\Local\Programs\Thonny\lib\site-packages\shapely\geos.py", line 62, in load_dll

libname, fallbacks or []))

OSError: Could not find lib geos_c.dll or load any of its variants [].

Aivar Annamaa

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May 19, 2021, 12:08:37 PM5/19/21

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Hi!

When googling the error message, I get the impression that this library can be reliably installed with conda. So I suggest you install Anaconda (https://www.anaconda.com/products/individual), then conda install the library there and let Thonny use Anaconda as back-end (Run => Select interpreter => Alternative Python 3...). I'm happy to dig further if you still can't use it in Thonny (and can use it outside of Thonny).

Best regards,
Aivar

Yennyffer Duran

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May 19, 2021, 4:07:03 PM5/19/21

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Thanks Aivar, that's what I did.

I installed miniconda and change the interpreter in Thony and then I installed the library and It work well.