python繪製二叉樹的實現

安裝相應類庫

graphviz windows : http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.38.msi
或
http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.38.zip

pygraphviz windows:
http://www.lfd.uci.edu/~gohlke/pythonlibs/#pygraphviz
具體連接根據操作系統版本和python版本來下載：

pygraphviz‑1.3.1‑cp27‑none‑win32.whl
pygraphviz‑1.3.1‑cp27‑none‑win_amd64.whl
pygraphviz‑1.3.1‑cp34‑none‑win32.whl
pygraphviz‑1.3.1‑cp34‑none‑win_amd64.whl

如我用的是win32 python 2.7

http://www.lfd.uci.edu/~gohlke/pythonlibs/vu0h7y4r/pygraphviz-1.3.1-cp27-none-win32.whl

環境變量

將 graphviz 的安裝路徑下的bin目錄添加了環境變量Path中。

執行python程序

A=pgv.AGraph(directed=True,strict=True)
A.add_edge(1,2)
A.add_edge(1,3)
A.add_edge(2,4)
A.add_edge(2,5)
A.add_edge(5,6)
A.add_edge(5,7)
A.add_edge(3,8)
A.add_edge(3,9)
A.add_edge(8,10)
A.add_edge(8,11)
A.graph_attr['epsilon']='0.01'
print A.string() # print dot file to standard output
A.write('fooOld.dot')
A.layout('dot') # layout with dot
A.draw('a.png') # write to file

即可繪製出圖片