pygraphviz をインストールしようとしています。次のコマンドでインストールしようとしましたが、残念ながら機能していません。誰でもそれを修正する方法を助けることができますか?
C:\Python27\Lib\site-packages\pygraphviz-1.2>python setup.py build -c mingw32
library_path=c:\Program Files (x86)\Graphviz 2.28\bin
include_path=c:\Program Files (x86)\Graphviz 2.28\include\graphviz
running build
running build_py
creating build
creating build\lib.win32-2.7
creating build\lib.win32-2.7\pygraphviz
copying pygraphviz\agraph.py -> build\lib.win32-2.7\pygraphviz
copying pygraphviz\graphviz.py -> build\lib.win32-2.7\pygraphviz
copying pygraphviz\release.py -> build\lib.win32-2.7\pygraphviz
copying pygraphviz\version.py -> build\lib.win32-2.7\pygraphviz
copying pygraphviz\__init__.py -> build\lib.win32-2.7\pygraphviz
creating build\lib.win32-2.7\pygraphviz\tests
copying pygraphviz\tests\test.py -> build\lib.win32-2.7\pygraphviz\tests
copying pygraphviz\tests\__init__.py -> build\lib.win32-2.7\pygraphviz\tests
copying pygraphviz\tests\attributes.txt -> build\lib.win32-2.7\pygraphviz\test
copying pygraphviz\tests\graph.txt -> build\lib.win32-2.7\pygraphviz\tests
copying pygraphviz\tests\layout_draw.txt -> build\lib.win32-2.7\pygraphviz\tes
copying pygraphviz\tests\unicode.txt -> build\lib.win32-2.7\pygraphviz\tests
running build_ext
building 'pygraphviz._graphviz' extension
creating build\temp.win32-2.7
creating build\temp.win32-2.7\Release
creating build\temp.win32-2.7\Release\pygraphviz
gcc -mno-cygwin -mdll -O -Wall "-Ic:\Program Files (x86)\Graphviz 2.28\include
raphviz" -Ic:\python27\include -Ic:\python27\PC -c pygraphviz/graphviz_wrap.c
build\temp.win32-2.7\Release\pygraphviz\graphviz_wrap.o
error: command 'gcc' failed: No such file or directory