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

#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))

其他回答

在安装包之后(如果没有,请链接),将路径作为一个新的系统变量添加到dot.exe。

默认路径为:

C:\Program Files (x86)\ Graphviz2.38\bin\dot.exe

Mac & Big Sur。Python 3.8.6 w/vs code。虽然它应该包含在图表包中,但我不得不手动安装graphviz。

(mymltools) ➜  infrastructure git:(master) pip list
Package    Version
---------- -------
diagrams   0.18.0
graphviz   0.13.2
Jinja2     2.11.2
MarkupSafe 1.1.1
pip        20.3.2
setuptools 51.0.0
wheel      0.36.2

运行图表失败。然后手动运行

pipenv install graphviz

效果非常好。

只需将下面添加到您的环境变量(系统)PATH 在Windows上

C:\Program Files (x86)\ Graphviz2.38\bin 在那里,你可以找到.exe文件

如果不工作

在程序文件中找到Graphviz2.38/bin文件夹,而不是在python lib中

然后,添加到您的PATH

找到存在.exe文件的文件夹很重要

在Ubuntu Linux上,这为我解决了这个问题:

pip install graphviz
sudo apt-get install graphviz

如果使用Anaconda,也可以尝试conda install -c conda-forge graphviz而不是pip。

使用conda install graphviz和conda install python-graphviz在Windows10上安装graphviz,需要的路径是C:/ProgramData/Anaconda3/Library/bin/graphviz/。即添加

import os
os.environ["PATH"] += os.pathsep + 'C:/ProgramData/Anaconda3/Library/bin/graphviz/'

帮我解决了这个问题。