title: howto install pygraphviz on windows 10 64bit
body: <p>Has anyone succeeded in installing pygraphviz on windows 10 64bit? I tried anaconda with python 3.5 64bit &amp; 32bit with no success.</p>
  
  <p>Here is the error I am getting with python 3.5 32bit on win10 64bit</p>
  
  <pre><code>python -m pip install pygraphviz --install-option="--include-path=C:\Program Files (x86)\Graphviz2.38\include" --install-option="--library-path=C:\Program Files (x86)\Graphviz2.38\lib"
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD "-IC:\Program Files (x86)\Graphviz2.38\include" -IC:\Users\tra20\Anaconda3\include -IC:\Users\tra20\Anaconda3\include "-IC:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\8.1\include\shared" "-IC:\Program Files (x86)\Windows Kits\8.1\include\um" "-IC:\Program Files (x86)\Windows Kits\8.1\include\winrt" /Tcpygraphviz/graphviz_wrap.c /Fobuild\temp.win32-3.5\Release\pygraphviz/graphviz_wrap.obj
  graphviz_wrap.c
  pygraphviz/graphviz_wrap.c(3321): warning C4047: 'return': 'int' differs in levels of indirection from 'Agsym_t *'
  C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO "/LIBPATH:C:\Program Files (x86)\Graphviz2.38\lib" /LIBPATH:C:\Users\tra20\Anaconda3\libs /LIBPATH:C:\Users\tra20\Anaconda3\PCbuild\win32 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\LIB" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.10240.0\ucrt\x86" "/LIBPATH:C:\Program Files (x86)\Windows Kits\8.1\lib\winv6.3\um\x86" cgraph.lib cdt.lib /EXPORT:PyInit__graphviz build\temp.win32-3.5\Release\pygraphviz/graphviz_wrap.obj /OUT:build\lib.win32-3.5\pygraphviz\_graphviz.cp35-win32.pyd /IMPLIB:build\temp.win32-3.5\Release\pygraphviz\_graphviz.cp35-win32.lib
  LINK : fatal error LNK1181: cannot open input file 'cgraph.lib'
  error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\link.exe' failed with exit status 1181
  </code></pre>
  
  <p>I assume it has something to do with the fact graphviz is linked in 32bit?</p>
  
  <p>Note - I tried all binary for pygraphviz i could found on internet(anaconda,internet), and none work on win10 64bit... if you have any working (i mean you realy tested it ) i would be also happy ...</p>