无法找到库 geos_c 或加载其任何变体

Shapely loads geos via ctypes.

Try this in your python and see if you get anything:

from ctypes.util import find_library
find_library('geos_c')

If it doesn't work, then your geos installation is probably messed up. According to this, your geos should be in /usr/lib/libgeos_c.so.1. Is your library actually there?

Installed shapely using pip, and had the same problem. So I went ahead and installed it like so:

sudo apt-get install libgeos-dev

And it worked. I'm running Ubuntu, so if you're on Fedora, you should run:

sudo yum install geos-devel

On MACOS you can run:

brew install geos

set the LD_LIBRARY_PATH, then run python

export LD_LIBRARY_PATH=/path_to/geos/lib:$LD_LIBRARY_PATH


python mytest.py

If you're using Anaconda like I am and ran into this, copy the libgeos* files from /usr/lib to the anaconda/lib directory and try again... :) Hopefully this saves someone else, cause I have spent hours on this.

I had the same problem, and to solve it, you need to add the lib path to ld.so.conf file.

To do this, Open the file:

sudo vi /etc/ld.so.conf

add this line

/usr/local/lib

And then

sudo /sbin/ldconfig

On Fedora install geos and geos-devel

sudo yum install geos geos-devel

In ubuntu, the following commands should take care of it. It all goes down to the following packages.

(Original 2017)

sudo apt-get install libgeos-c1 libgeos-3.4.2

EDIT: (updated versions 2020)

sudo apt-get install libgeos-c1v5 libgeos-3.7.1

I had no problem on Jupyter Notebook but when I used PyCharm I encountered this issue. Tried multiple things windows on machine and the below troubleshooting steps fixed the issue

pip install geos

Go to PyCharm, File->Settings->Project->Project Interpreter(Check you have the right path where your python.exe file is there)->Add

Check that, on Virtualenv Environment -> Base Interpreter pointing to the right location where you have the python.exe

Same for System Interpreter->Interpreter And also Pipenv Environment -> Base Interpreter

Make sure all are pointing to the right path. I encountered this problem as I have multiple IDE and hence multiple directories where python.exe is available.They were pointing to incorrect directories.

During the troubleshooting I also uninstalled and re installed conda install shapelyas I am pointing to Anaconda directory from PyCharm. Hope it helps.

Below link is also helpful https://www.jetbrains.com/help/pycharm/installing-uninstalling-and-upgrading-packages.html#conda-package-manager

brew install geos

Just this installation solved my issues.

If you have macos, you should run:

brew install geos

Source distributions

If you want to build Shapely from source for compatibility with other modules that depend on GEOS (such as cartopy or osgeo.ogr) or want to use a different version of GEOS than the one included in the project wheels you should first install the GEOS library, Cython, and Numpy on your system (using apt, yum, brew, or other means) and then direct pip to ignore the binary wheels.

pip install shapely --no-binary shapely

If you've installed GEOS to a standard location, the geos-config program will be used to get compiler and linker options. If geos-config is not on your executable, it can be specified with a GEOS_CONFIG environment variable, e.g.:

GEOS_CONFIG=/path/to/geos-config pip install shapely

I am using Linux (Red Hat) and I got this error:

OSError: /home/[user]/.conda/envs/ox/lib/libgeos_c.so: cannot open shared object file: No such file or directory

What works for me:

conda install geos