近來，在學習python的數據挖掘，需要安裝pygraphviz，與諸多麻煩：
注：我的系統是fedora 17beta版；python2.7.3
1、我首先直接安裝pygraphviz（easy_install），提示錯誤：
1) You don't have Graphviz installed:
Install Graphviz (http://graphviz.org)
2) Your Graphviz package might incomplete.
Install the binary development subpackage (e.g. libgraphviz-dev or similar.)
3) You are using Windows
There are no PyGraphviz binary packages for Windows but you might be
able to build it from this source. See
http://networkx.lanl.gov/pygraphviz/reference/faq.html
2、按照以上錯誤提示，我先安裝了Graphviz(yum install graphviz),木牛問題；
3、接着再試着安裝libgraphviz-dev，安裝失敗；
4、轉而使用pip安裝，出現如下錯誤：
Your graphviz installation could not be found. Either the graphviz package is missing on incomplete (binary packages graphviz-dev or graphviz-devel missing?). If you think your installation is correct you will need to manually change the include_path and library_path variables in setup.py to point to the correct locations of your graphviz installation. The current setting of library_path and include_path is: library_path=None include_path=None error: None
使用pip安裝和easy_install所不同的是，其在主文件夾中會出現一個bulid文件夾，pygraphviz文件被下載緩存在此；
5、於是，修改pygraphviz文件夾中的setup.py文件夾，我使用的是vi；
在其中可以看到：
from glob import glob
import os
import sys
if os.path.exists('MANIFEST'): os.remove('MANIFEST')
from distutils.core import setup, Extension
from setup_extra import pkg_config, dotneato_config
if sys.argv[-1] == 'setup.py':
print "To install, run 'python setup.py install'" //這個我們接下來會用到的；
if sys.version_info[:2] < (2, 4):
print "PyGraphviz requires Python version 2.4 or later (%d.%d detected)." % \
sys.version_info[:2]
sys.exit(-1)
library_path=None
include_path=None
上面這兩行需要注釋掉
# If the setup script couldn't find your graphviz installation you can
# specify it here by uncommenting these lines or providing your own:
# You must set both 'library_path' and 'include_path'
# Linux, generic UNIX
#library_path='/usr/lib/graphviz'
#include_path='/usr/include/graphviz'
# OSX, Linux, alternate location
#library_path='/usr/local/lib/graphviz'
#include_path='/usr/local/include/graphviz'
上面這兩行需要取消注釋
# OSX (Fink)
#library_path='/sw/lib/graphviz'
#include_path='/sw/include/graphviz'
# OSX (MacPorts)
#library_path='/opt/local/lib/graphviz'
#include_path='/opt/local/include/graphviz'
# Windows
# Unknown
# Attempt to find Graphviz installation
if library_path is None and include_path is None:
print "Trying pkg-config"
include_path,library_path=pkg_config()
if library_path is None and include_path is None:
print "Trying dotneato-config"
include_path,library_path=dotneato_config()
if library_path is None or include_path is None:
print """Your Graphviz installation could not be found.
1) You don't have Graphviz installed:
Install Graphviz (http://graphviz.org)
2) Your Graphviz package might incomplete.
Install the binary development subpackage (e.g. libgraphviz-dev or similar.)
3) You are using Windows
There are no PyGraphviz binary packages for Windows but you might be
able to build it from this source. See
http://networkx.lanl.gov/pygraphviz/reference/faq.html
這個不就是之前的錯誤提示么？
If you think your installation is correct you will need to manually
change the include_path and library_path variables in setup.py to
point to the correct locations of your graphviz installation.
6、按照上述操作進行修改，之后運行 python setup.py install，但是依然出現錯誤：“gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fs………………”
7、應該是gcc包缺失，於是乎，繼續安裝gcc；使用yum install gcc，出現錯誤——一些依賴包無法安裝；
8、判斷可能是某些包版本不夠新，升級之(update-testing)
9、升級完之后，在安裝pygraphviz，出現錯誤：“致命錯誤，python.h沒有這個文件或目錄。”
10、然后，安裝包“python-dev”（yum install python-devel）；
11、easy_install 安裝，成功。import pygraphviz，沒有報錯，OK！