我下载了Graphviz 2.38 MSI版本,安装在C:\Python34文件夹下,然后运行pip安装Graphviz,一切顺利。在系统路径中我添加了C:\Python34\bin。当我试图运行一个测试脚本,在行filename= .render(filename='test'),我得到了一个消息

 RuntimeError: failed to execute ['dot', '-Tpdf', '-O', 'test'], make sure the Graphviz executables are on your systems' path

我尝试将“C:\Python34\bin\dot.exe”放在系统路径中,但它不起作用,我甚至创建了一个新的环境变量“GRAPHVIZ_DOT”,其值为“C:\Python34\bin\dot.exe”,仍然不起作用。我尝试卸载Graphviz和pip uninstall Graphviz,然后重新安装它和pip install,但没有任何工作。

整个回溯消息是:

Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\graphviz\files.py", line 220, in render
    proc = subprocess.Popen(cmd, startupinfo=STARTUPINFO)
  File "C:\Python34\lib\subprocess.py", line 859, in __init__
    restore_signals, start_new_session)
  File "C:\Python34\lib\subprocess.py", line 1112, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Documents\Kissmetrics\curves and lines\eventNodes.py", line 56, in <module>
    filename=dot.render(filename='test')
  File "C:\Python34\lib\site-packages\graphviz\files.py", line 225, in render
    'are on your systems\' path' % cmd)
RuntimeError: failed to execute ['dot', '-Tpdf', '-O', 'test'], make sure the Graphviz executables are on your systems' path

有人有经验吗?


当前回答

import os
os.environ["PATH"] += os.pathsep + "/Macintosh HD⁩/anaconda3⁩/lib⁩/⁨python3.7⁩/site-packages⁩/sphinx⁩/templates⁩/graphviz"

这为我解决了MAC上的PATH问题!

其他回答

OS Mojave 10.14。, Python 3.6

使用pip安装graphviz在终端有很好的反馈,但是当我试图在Jupyter笔记本上制作图形时,导致了这个错误。然后我运行了brew install graphviz,它在终端中给出了一个错误。然后我运行conda install graphviz,图形工作了。

来自@Leighton的评论:pip只会得到和你一样的路径问题,conda只会得到导入错误。

如果你使用的不是Conda,而是普通的Python, 'brew install graphviz'可以工作。

我在Mac OS (El Capitan)上使用PyCharm IDE时也遇到了同样的错误信息。 我已经使用brew安装了Graphviz,正如RZK的回答中推荐的那样,并使用PyCharm安装了Graphviz python包(我可以通过在终端中尝试点- v并获得:点- Graphviz version 2.40.1(20161225.0304)来检查Graphviz是否正确安装)。 然而,当我试图从PyCharm调用Graphviz时,我仍然收到错误消息。

我必须在PyCharm选项中添加路径/usr/local/bin,就像在回答这个问题时建议的那样来解决这个问题。

#Write this on anaconda prompt in admin mode
conda install -c anaconda graphviz
conda install -c conda-forge python-graphviz
conda install -c conda-forge/label/broken python-graphviz
conda install -c conda-forge/label/cf201901 python-graphviz
conda install -c conda-forge/label/cf202003 python-graphviz

#check dot -v in window's cmd prompt
C:\WINDOWS\system32>dot -V
dot - graphviz version 2.38.0 (20140413.2041)
(this means graphviz installed successfully)

#Add path to sys and user eve variables
PATH
C:\Anaconda3\pkgs\graphviz-2.38-hfd603c8_2\Library\bin
(search bin folder of graphviz and then copy n paste path in env variables)

#Re-run all cmds in jyupter notebook
#if error occurs (less chances)
#then 
#Restart anaconda and again run all cmds in jyupter notebook
eg.
import graphviz as gp
with open("tree.dot") as f:
    dot_read=f.read()
display(gp.Source(dot_read))

1) Graphviz -在系统的特定位置下载解压缩(pip在windows中不起作用),并在每个程序中手动设置的路径(' set environment variables in windows ' OR)中包含bin文件夹

import os
os.environ["PATH"] += os.pathsep + 'C:/GraphViz/bin'

2)然后将模型放到图中

clf = xgb.train(params, d_train, 1000, evals=evallist, early_stopping_rounds=10)
xgb.plot_tree(clf)
plt.rcParams['figure.figsize'] = [50, 10]
plt.show()