Question

我在win7（64）上遇到pygraphviz问题。我安装了Graphviz，然后是pygraphviz。当我尝试编译我的代码时

G=pgv.AGraph()
d={'1': {'2': None}, '2': {'1': None, '3': None}, '3': {'2': None}}
A=pgv.AGraph(d)
G.add_node(1, color='red')
G.add_edge('b','c',color='blue')
G.layout(prog='dot') 
G.draw('file.png')

我收到此错误

pydev debugger: starting
Traceback (most recent call last):
  File "D:\Program Files\Eclipse\plugins\org.python.pydev_3.3.3.201401272249\pysrc\pydevd.py", line 1738, in <module>
    debugger.run(setup['file'], None, None)
  File "D:\Program Files\Eclipse\plugins\org.python.pydev_3.3.3.201401272249\pysrc\pydevd.py", line 1355, in run
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "D:\Users\SUUSER\workspace\ThreadGraph\parseText.py", line 17, in <module>
    G.layout(prog='dot') 
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1305, in layout
    data=self._run_prog(prog,' '.join([args,"-T",fmt]))
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1251, in _run_prog
    runprog=r'"%s"'%self._get_prog(prog)
  File "C:\Python27\lib\site-packages\pygraphviz\agraph.py", line 1239, in _get_prog
    raise ValueError("Program %s not found in path."%prog)
ValueError: Program dot not found in path.

别告诉我这是重复的。我看了所有的答案。

pygraphviz ValueError: Program dot not found in path

(Python) ValueError: Program dot not found in path

PyGraphViz agraph.layout() throws I0 error

Answer 1

如果PyGraphviz bin目录尚未添加到路径中，即使安装了PyGraphviz，也可能会出现此问题。我在Windows上遇到了这个问题（用.msi安装PyGraphviz之后）。

要解决此问题，请将bin目录（例如C：\ Program Files（x86）\ Graphviz2.38 \ bin）添加到PATH系统变量，例如：在Win7上：

系统属性 - ＆gt;环境变量 - ＆gt;系统变量 - ＆gt;路径 - ＆gt;编辑...

Answer 2

如果您安装了Anaconda，最简单的方法是从CMD运行以下内容：

conda install graphviz

您可能还需要以下内容：

conda install pydot-ng

pygraphviz ValueError：路径中找不到程序点（python）

2 个答案: