纪念一下装了一天终于成功了的 pygraphviz

老师给了我们一个python文件让我们看懂，然后里面有一句

importpygraphvizaspgv
为了能让程序在自己的电脑上，跑起来，我像往常一样，用pipinstallpygraphviz来安装，然后，另人苦逼的是各种报错哇。
然后在github下载了包(https://github.com/pygraphviz),解压后用pythonsetup.pyinstall
报错，内容为fatalerror:graphviz/cgraph.h:Nosuchfile
然后在stackoverflow上找到的解决办法是
编辑setup.py文件中添加这些位置作为目录：

[code]include_dirs='C:/ProgramFiles(x86)/Graphviz2.38/include'
library_dirs='C:/ProgramFiles(x86)/Graphviz2.38/lib'

同时我在readme里面看到，这个需要和Graphviz软件一起使用，而我并没有下载，好滴吧，先到官网上下载了Graphviz-2.38

并且添加了目录
再次install

然后错误变得更多了：

$pythonsetup.pyinstall
library_dirs=C:/ProgramFiles(x86)/Graphviz2.38/lib/release/lib
include_dirs=C:/ProgramFiles(x86)/Graphviz2.38/include
runninginstall
runningbdist_egg
runningegg_info
writingpygraphviz.egg-info\PKG-INFO
writingtop-levelnamestopygraphviz.egg-info\top_level.txt
writingdependency_linkstopygraphviz.egg-info\dependency_links.txt
readingmanifestfile'pygraphviz.egg-info\SOURCES.txt'
readingmanifesttemplate'MANIFEST.in'
warning:nopreviously-includedfilesmatching'*~'foundanywhereindistribution
warning:nopreviously-includedfilesmatching'*.pyc'foundanywhereindistribution
warning:nopreviously-includedfilesmatching'.svn'foundanywhereindistribution
nopreviously-includeddirectoriesfoundmatching'doc\build'
writingmanifestfile'pygraphviz.egg-info\SOURCES.txt'
installinglibrarycodetobuild\bdist.win-amd64\egg
runninginstall_lib
runningbuild_py
runningbuild_ext
building'pygraphviz._graphviz'extension
C:\Users\GJWood\AppData\Local\Programs\Common\Microsoft\VisualC++forPython\9.0\VC\Bin\amd64\cl.exe/c/nologo/Ox/MD
/W3/GS-/DNDEBUG-DGVDLL"-IC:/ProgramFiles(x86)/Graphviz2.38/include"-Ic:\Users\GJWood\Anaconda\include-Ic:\Users
\GJWood\Anaconda\PC/Tcpygraphviz/graphviz_wrap.c/Fobuild\temp.win-amd64-2.7\Release\pygraphviz/graphviz_wrap.obj
graphviz_wrap.c
pygraphviz/graphviz_wrap.c(3295):warningC4267:'=':conversionfrom'size_t'to'int',possiblelossofdata
pygraphviz/graphviz_wrap.c(3313):warningC4267:'=':conversionfrom'size_t'to'int',possiblelossofdata
pygraphviz/graphviz_wrap.c(3321):warningC4047:'return':'int'differsinlevelsofindirectionfrom'Agsym_t*'
pygraphviz/graphviz_wrap.c(3407):warningC4101:'mode_byte_obj1':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3406):warningC4101:'mode_obj1':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3408):warningC4101:'mode1':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3405):warningC4101:'fd1':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3466):warningC4101:'mode2':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3464):warningC4101:'mode_obj2':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3463):warningC4101:'fd2':unreferencedlocalvariable
pygraphviz/graphviz_wrap.c(3465):warningC4101:'mode_byte_obj2':unreferencedlocalvariable
C:\Users\GJWood\AppData\Local\Programs\Common\Microsoft\VisualC++forPython\9.0\VC\Bin\amd64\link.exe/DLL/nologo/IN
CREMENTAL:NO"/LIBPATH:C:/ProgramFiles(x86)/Graphviz2.38/lib/release/lib"/LIBPATH:c:\Users\GJWood\Anaconda\libs/LIBP
ATH:c:\Users\GJWood\Anaconda\PCbuild\amd64cgraph.libcdt.lib/EXPORT:init_graphvizbuild\temp.win-amd64-2.7\Release\pyg
raphviz/graphviz_wrap.obj/OUT:build\lib.win-amd64-2.7\pygraphviz\_graphviz.pyd/IMPLIB:build\temp.win-amd64-2.7\Release
\pygraphviz\_graphviz.lib/MANIFESTFILE:build\temp.win-amd64-2.7\Release\pygraphviz\_graphviz.pyd.manifest
graphviz_wrap.obj:warningLNK4197:export'init_graphviz'specifiedmultipletimes;usingfirstspecification
Creatinglibrarybuild\temp.win-amd64-2.7\Release\pygraphviz\_graphviz.libandobjectbuild\temp.win-amd64-2.7\Releas
e\pygraphviz\_graphviz.exp
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagsafesetreferencedinfunctionagsafeset_label
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagstrdup_htmlreferencedinfunctionagsafeset_label
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagattrreferencedinfunctionagattr_label
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagopenreferencedinfunction_wrap_agopen
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagclosereferencedinfunction_wrap_agclose
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagreadreferencedinfunction_wrap_agread
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagwritereferencedinfunction_wrap_agwrite
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagisundirectedreferencedinfunction_wrap_agisundirected

graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagisdirectedreferencedinfunction_wrap_agisdirected
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagisstrictreferencedinfunction_wrap_agisstrict
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnodereferencedinfunction_wrap_agnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagidnodereferencedinfunction_wrap_agidnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagsubnodereferencedinfunction_wrap_agsubnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagfstnodereferencedinfunction_wrap_agfstnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtnodereferencedinfunction_wrap_agnxtnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolaglstnodereferencedinfunction_wrap_aglstnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagprvnodereferencedinfunction_wrap_agprvnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagedgereferencedinfunction_wrap_agedge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagidedgereferencedinfunction_wrap_agidedge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagsubedgereferencedinfunction_wrap_agsubedge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagfstinreferencedinfunction_wrap_agfstin
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtinreferencedinfunction_wrap_agnxtin
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagfstoutreferencedinfunction_wrap_agfstout
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtoutreferencedinfunction_wrap_agnxtout
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagfstedgereferencedinfunction_wrap_agfstedge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtedgereferencedinfunction_wrap_agnxtedge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagattrsymreferencedinfunction_wrap_agattrsym
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtattrreferencedinfunction_wrap_agnxtattr
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolaggetreferencedinfunction_wrap_agget
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagxgetreferencedinfunction_wrap_agxget
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagsetreferencedinfunction_wrap_agset
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagxsetreferencedinfunction_wrap_agxset
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagsubgreferencedinfunction_wrap_agsubg
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagfstsubgreferencedinfunction_wrap_agfstsubg
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnxtsubgreferencedinfunction_wrap_agnxtsubg
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagparentreferencedinfunction_wrap_agparent
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagrootreferencedinfunction_wrap_agroot
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagdelsubgreferencedinfunction_wrap_agdelsubg
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnnodesreferencedinfunction_wrap_agnnodes
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnedgesreferencedinfunction_wrap_agnedges
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagdegreereferencedinfunction_wrap_agdegree
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagraphofreferencedinfunction_wrap_agraphof
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagnameofreferencedinfunction_wrap_agnameof
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagdelnodereferencedinfunction_wrap_agdelnode
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolagdeledgereferencedinfunction_wrap_agdeledge
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolAgdirectedreferencedinfunctionSwig_var_Agdirected_get
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolAgstrictdirectedreferencedinfunctionSwig_var_Agstrictd
irected_get
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolAgundirectedreferencedinfunctionSwig_var_Agundirected_
get
graphviz_wrap.obj:errorLNK2019:unresolvedexternalsymbolAgstrictundirectedreferencedinfunctionSwig_var_Agstric
tundirected_get
build\lib.win-amd64-2.7\pygraphviz\_graphviz.pyd:fatalerrorLNK1120:49unresolvedexternals
error:command'C:\\Users\\GJWood\\AppData\\Local\\Programs\\Common\\Microsoft\\VisualC++forPython\\9.0\\VC\\Bin\\amd
64\\link.exe'failedwithexitstatus1120

这时候我才想起，可以到http://www.lfd.uci.edu/~gohlke/pythonlibs/直接下载.whl文件哇。
下载并安装

pipinstallpygraphviz‑1.3.1‑cp27‑none‑win_amd64.whl

成功啦

然而这并没有结束

当我试着打了如下代码，并运行时：

importpygraphvizaspgv
G=pgv.AGraph(strict=False,directed=True)

G.add_node('a')
G.add_node('b')
G.add_edge('b','c')

nodelist=['f','g','h']
G.add_nodes_from(nodelist)

#attributes
G.graph_attr['label']="simplenodesandedge"
G.node_attr['shape']='circle'
G.edge_attr['color']='red'

s=G.to_string()

G.write("first.dot")

G.layout(prog='dot')

G.draw('first.png')

它依旧报错

Traceback(mostrecentcalllast):
File"D:\ProgramFiles\Eclipse\plugins\org.python.pydev_3.3.3.201401272249\pysrc\pydevd.py",line1738,in<module>
debugger.run(setup['file'],None,None)
File"D:\ProgramFiles\Eclipse\plugins\org.python.pydev_3.3.3.201401272249\pysrc\pydevd.py",line1355,inrun
pydev_imports.execfile(file,globals,locals)#executethescript
File"D:\Users\SUUSER\workspace\ThreadGraph\parseText.py",line17,in<module>
G.layout(prog='dot')
File"C:\Python27\lib\site-packages\pygraphviz\agraph.py",line1305,inlayout
data=self._run_prog(prog,''.join([args,"-T",fmt]))
File"C:\Python27\lib\site-packages\pygraphviz\agraph.py",line1251,in_run_prog
runprog=r'"%s"'%self._get_prog(prog)
File"C:\Python27\lib\site-packages\pygraphviz\agraph.py",line1239,in_get_prog
raiseValueError("Program%snotfoundinpath."%prog)
ValueError:Programdotnotfoundinpath.

查到的资料说“PyGraphvizdoesn'tworkwithoutGraphviz.Installthattoo.”（http://stackoverflow.com/questions/13987353/python-valueerror-program-dot-not-found-in-path?rq=1）

可是我已经装了呀。这是才想起来，是不是还要设置环境变量什么的：我又把C:\ProgramFiles(x86)\Graphviz2.38\bin加到PATH里去

关了pycharm,重开，运行，OK，不报错了

最后的最后，放出相关下载链接

graphviz-2.38.msi链接：http://pan.baidu.com/s/1nu4wcgp密码：zazz

pygraphviz‑1.3.1‑cp27‑none‑win_amd64.whl链接：http://pan.baidu.com/s/1c1nJyKg密码：wra9