FAQ

Q

I followed the installation instructions but when I do

>>> import pygraphviz

I get an error like ImportError: libagraph.so.1: cannot open shared object file: No such file or directory

What is wrong?

A

Some Unix systems don’t include the Graphviz library in the default search path for the run-time linker. The path is often something like /usr/lib/graphviz or /sw/lib/graphviz etc. and it needs to be added to your search path. You can

1. set the LD_LIBRARY_PATH environment variable e.g. export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/lib/graphviz

2. configure your system with the additional path. e.g. for Linux add a line to /etc/ld.so.conf and run ldconfig

Q

How do I compile pygraphviz under Windows? And why don’t you distribute a pygraphviz Windows installer?

A

We don’t have Windows development machines but would like to have pygraphviz work on all platforms. If you have success with Windows or would be willing to help test and distribute a Windows installer please drop us a note.

See also issues at: https://github.com/pygraphviz/pygraphviz/search?q=Windows&type=Issues