entityMap|blocks|key|3fv3m|text|如图所示，Graphviz2.37在windows上的PATH变量存在问题。我卸载了它，删除了与它相关的环境变量，而是下载并安装了较新的测试版2.39，它现在运行得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

As it appears, Graphviz2.37 is known to have problems with the PATH variable on windows. I uninstalled it, removed the environment variables associated with it and instead downloaded and installed the newer beta version 2.39 and it now works like a charm.

entityMap|blocks|key|dnmo0|text|在带有win10+anaconda的jupyter(ipython)笔记本上，我通过以下方式解决了这个问题conda+install+graphviz+在我通过以下方式安装了graphviz之后pip+install+graphviz|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3h3rf|aaplq^0|1H|M|2P|K|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@$A|J|B|K|C|D]|$A|L|B|M|C|D]]|E|@]|F|$]]|$2|G|4|-4|6|7|8|N|9|@]|E|@]|F|$]]|$2|H|4|-4|6|7|8|O|9|@]|E|@]|F|$]]]]

On jupyter(ipython) notebook with anaconda in win10 I solved the problem by <code>conda install graphviz</code> after I had installed graphviz by <code>pip install graphviz</code>

entityMap|blocks|key|7up2p|text|我在Ubuntu(14.04)和Jupyter上也遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|e5pn2|为了解决这个问题，我在python+sys.path中添加了点库|d9vde|首先:检查是否安装了dot。|9kso7|然后:找到他的道路|cgnr8|->+/local/notebook/miniconda2/envs/ik2/bin/dot|332cb|最后在python脚本中:+sys.path.append("/local/notebook/miniconda2/envs/ik2/bin/dot")^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|N|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|O|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|P|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|Q|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|R|9|@]|A|@]|B|$]]]]

I had the same issue on Ubuntu(14.04) with Jupyter.

To solve it I've added the dot library to python sys.path

First: check if dot is installed,

Then:
find his path <code>whereis dot</code> -> /local/notebook/miniconda2/envs/ik2/bin/dot

Finally in python script : sys.path.append("/local/notebook/miniconda2/envs/ik2/bin/dot")

entityMap|blocks|key|2mjm6|text|在我的例子中(Win10、Anaconda3、Jupyter+notebook)"conda+install+graphviz"我必须添加到路径中：C:\Users\username\Anaconda3\Library\bin\graphviz|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5e6ap|要修改路径，请转到|2j4tn|Control+Panel+>+System+and+Security+>+System+>+Advanced+System+Settings+>+Environment+Variables+>+Path+>+Edit+>+New|7teia|8mse9^0|14|O|22|1C|0|0|0|37|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@$A|N|B|O|C|D]|$A|P|B|Q|C|D]]|E|@]|F|$]]|$2|G|4|H|6|7|8|R|9|@]|E|@]|F|$]]|$2|I|4|J|6|7|8|S|9|@$A|T|B|U|C|D]]|E|@]|F|$]]|$2|K|4|-4|6|7|8|V|9|@]|E|@]|F|$]]|$2|L|4|-4|6|7|8|W|9|@]|E|@]|F|$]]]]

In my case (Win10, Anaconda3, Jupyter notebook) after <code>"conda install graphviz"</code> I have to add to the PATH: <code>C:\Users\username\Anaconda3\Library\bin\graphviz</code>

To modify PATH goto <code>Control Panel &gt; System and Security &gt; System &gt; Advanced System Settings &gt; Environment Variables &gt; Path &gt; Edit &gt; New</code>

entityMap|blocks|key|eoujk|text|我解决了这个问题，直接从https://graphviz.gitlab.io/_pages/Download/Download_windows.html并包含在windows路径中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|f4rm1|C:\Program+Files+(x86)\Graphviz2.38\bin

C:\Program+Files+(x86)\Graphviz2.38|code-block|syntax|javascript|ccjh5|在我重新启动windows之后^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|K|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|L|9|@]|A|@]|B|$]]]]

I solved it installing directly from <code>https://graphviz.gitlab.io/_pages/Download/Download_windows.html</code> and including in windows path:

<pre><code>C:\Program Files (x86)\Graphviz2.38\bin

C:\Program Files (x86)\Graphviz2.38
</code></pre>

After I restart windows

entityMap|blocks|key|bqb1h|text|当您将C:\Program+Files+(x86)\Graphviz2.38\bin添加到PATH中时，您必须关闭诸如spyder之类的集成开发环境并重新启动，这样就解决了“运行错误:确保Graphviz可执行文件位于系统的path中”的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

when you add C:\Program Files (x86)\Graphviz2.38\bin to PATH, then you must close your IDE enviroment such as spyder and restart, you'll solve the "RuntimeError:make sure the Graphviz executables are on your systems' path"

entityMap|blocks|key|an7hp|text|为了解决这个问题，当你成功安装graphviz2.38，然后添加你的PATH变量到系统path.Under系统变量，你可以点击Path，然后点击编辑并添加;C:\Program+Files+(x86)\Graphviz2.38\bin到字符串和saved.After的末尾，像间谍一样重新启动你的pythonIDE，那么它工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|30jd7|不要忘记关闭Spyder，然后重新启动。^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|E|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|F|9|@]|A|@]|B|$]]]]

To solve this problem,when you install graphviz2.38 successfully, then add your PATH variable to system path.Under System Variables you can click on Path and then clicked Edit and added ;C:\Program Files (x86)\Graphviz2.38\bin to the end of the string and saved.After that,restart your pythonIDE like spyper,then it works well.

Don't forget to close Spyder and then restart.

entityMap|blocks|key|8m6h|text|我在Ubuntu+16.04上也遇到了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fphtk|通过运行以下命令修复|4recl|除了我已经执行的pip安装之外。^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

I also had this problem on Ubuntu 16.04.

Fixed by running <code>sudo apt-get install graphviz</code> in addition to the pip install I had already performed.

entityMap|blocks|key|jsuh|text|我在Windows10上也遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|76mbi|首先，我安装了graphviz-2.38.0使用以下命令没有任何问题...|7e4m4|install+-c+anaconda+graphviz=2.38.0|code-block|syntax|javascript|a4asm|第二，我安装了pydotplus使用以下命令没有任何问题...|7dcg7|install+-c+conda-forge+pydotplus|ei10s|在那之后，当我开始可视化我的决策树时，遇到了以下问题|278ee|{InvocationException:+GraphViz's+executables+not+found}...|offset|length|style|CODE|kmth|C:\Users\admin\Anaconda3\lib\site-packages\pydotplus\graphviz.py+in+create(self,+prog,+format)
+++1958+++++++++++++if+self.progs+is+None:
+++1959+++++++++++++++++raise+InvocationException(
->+1960+++++++++++++++++++++'GraphViz\'s+executables+not+found')
+++1961+
+++1962+++++++++if+prog+not+in+self.progs:

InvocationException:+GraphViz's+executables+not+found|bth88|在我的例子中，修复它所要做的就是将|dggo|我的用户中的可执行文件|dhu2c|环境变量，这修复了它。只需确保它是|e6ha1|文件位于:)|b37ta|C:\Users\admin\Anaconda3\pkgs\graphviz-2.38.0-4\Library\bin\graphviz^0|0|0|0|0|0|0|0|1J|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|17|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|18|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|19|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|1A|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|1B|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|1C|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1D|9|@$R|1E|S|1F|T|U]]|A|@]|B|$]]|$2|V|4|W|6|G|8|1G|9|@]|A|@]|B|$H|I]]|$2|X|4|Y|6|7|8|1H|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|1I|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|1J|9|@]|A|@]|B|$]]|$2|13|4|14|6|7|8|1K|9|@]|A|@]|B|$]]|$2|15|4|16|6|G|8|1L|9|@]|A|@]|B|$H|I]]]]

I had the same issue with Windows 10.

First, I installed <code>graphviz-2.38.0</code> with the following command without any problem...

<pre><code>install -c anaconda graphviz=2.38.0
</code></pre>

Second, I installed <code>pydotplus</code> with the following command without any problem...

<pre><code>install -c conda-forge pydotplus
</code></pre>

After that, when I got to my step to visualize my decision tree had the following issue with <code>{InvocationException: GraphViz's executables not found}</code>...

<pre><code>C:\Users\admin\Anaconda3\lib\site-packages\pydotplus\graphviz.py in create(self, prog, format)
 1958 if self.progs is None:
 1959 raise InvocationException(
-&gt; 1960 'GraphViz\'s executables not found')
 1961 
 1962 if prog not in self.progs:

InvocationException: GraphViz's executables not found
</code></pre>

In my case, all I had to do to fix it is to put the environment path of the <code>graphviz</code> executables in my user <code>PATH</code> environment variable and this fixed it. Just make sure it is the path where <code>YOUR.exe</code> files are located :)

<pre><code>C:\Users\admin\Anaconda3\pkgs\graphviz-2.38.0-4\Library\bin\graphviz
</code></pre>

entityMap|blocks|key|86nvo|text|因为没有提到Mac+OS，所以我要补充说，我在OS+X+Yosemite上也遇到了同样的问题，我找到的解决方案是这样做brew+install+graphviz|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fo0rq|这解决了问题，不确定我是否应该编辑这个列表中的其他答案之一，因为它们似乎都是相同的答案，只需在Python库之外安装一个官方包即可。^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|E|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|F|9|@]|A|@]|B|$]]]]

Because Mac OS has not been mentioned I will add that I had the same problem on OS X Yosemite, the solution I found was to do <code>brew install graphviz</code>

This solved the problem, not sure if I shouldn't have just edited one of the other answers in this list, because they all seem to be the same answer, just install an official package in addition to the Python Library.

entityMap|blocks|key|4keuv|text|只需安装|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7jq9n|conda+install+graphviz|code-block|syntax|javascript|a375o|然后安装|6gck7|conda+install+-c+conda-forge+pydotplus^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|N|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|O|9|@]|A|@]|B|$F|G]]]]

Just install 

<pre><code>conda install graphviz
</code></pre>

then install

<pre><code>conda install -c conda-forge pydotplus
</code></pre>

entityMap|blocks|key|5gfq7|text|对于windows8.1和python+2.7，我通过以下步骤修复了这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1mbnu|1.下载并安装graphviz+2.38.msi|7l12t|http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.38.msi|6fas2|2.设置path变量|89jg6|控制面板>系统和安全>系统>高级系统设置>环境变量>路径>编辑|3mqhp|添加'C:\Program+Files+(x86)\Graphviz2.38\bin‘^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|M|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|N|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|O|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|P|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|Q|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|R|9|@]|A|@]|B|$]]]]

For windows 8.1 &amp; python 2.7 , I fixed the problem by following below steps

1 . Download and install graphviz-2.38.msi <a href="http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.38.msi" rel="nofollow noreferrer">http://www.graphviz.org/pub/graphviz/stable/windows/graphviz-2.38.msi</a>

2 . Set the path variable

<ul>
<li>Control Panel > System and Security > System > Advanced System Settings > Environment Variables > Path > Edit</li>
<li>add 'C:\Program Files (x86)\Graphviz2.38\bin'</li>
</ul>

entityMap|blocks|key|6uc82|text|我在Anaconda+3上使用的是Windows10和Python3.6，也遇到过同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fp0f8|通过按顺序执行以下操作，我已经让它工作了：|d7vvh|从Anaconda终端:+pip+install+pydotplus|9ntek|从Anaconda终端:+conda+install+pydotplus|eaqqk|从Anaconda终端:+pip+install+graphviz|4q9cu|从Anaconda终端:+conda+install+graphviz|d2r6r|转到Windows+Environment+Varialbes，PATH，并将我的dot.exe文件的位置添加到Anaconda的graphviz目录下。|4n16v|在那之后工作得很好。^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Q|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|R|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|S|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|T|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|U|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|V|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|W|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|X|9|@]|A|@]|B|$]]]]

I'm using Windows 10, Python 3.6 on Anaconda 3 and have faced the same issue.

I've had it work by doing the following in sequence:

<ol>
<li>From Anaconda Terminal: pip install pydotplus</li>
<li>From Anaconda Terminal: conda install pydotplus</li>
<li>From Anaconda Terminal: pip install graphviz</li>
<li>From Anaconda Terminal: conda install graphviz</li>
<li>Went to Windows Environment Varialbes, PATH, and added the location of my dot.exe file under graphviz directory in Anaconda.</li>
</ol>

worked fine after that.

entityMap|blocks|key|flevi|text|如果您使用的是Win10，请安装Graphviz，然后使用以下命令添加路径。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|ncll|import+os
os.environ["PATH"]+%2B=+os.pathsep+%2B+'C:\Program+Files+(x86)\Graphviz2.38/bin/'|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

If you are on Win10, install Graphviz (<a href="https://graphviz.org/download/" rel="nofollow noreferrer">link</a>) and then use following command to add the path.
<pre><code>import os
os.environ[&quot;PATH&quot;] += os.pathsep + 'C:\Program Files (x86)\Graphviz2.38/bin/'
</code></pre>

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/7d5b2cf961ab61193dd6b3cca96a9b92.png|imageAlt|1|https://ask.qcloudimg.com/http-save/actteam/f4582032fcb2dfc32c8f7de30273803c.png|blocks|key|a3oid|text|请注意，我使用的是windows+10。下面的一些可能适用于其他版本的windows或操作系统，也可能不适用于其他版本的windows或操作系统：|unstyled|depth|inlineStyleRanges|entityRanges|6c3ij|f3mt5|*|e7e63|et245|注2：|f3fo0|1607f|5h86u|3qe4p|“系统上的Graphviz+bin文件地址”可以是|341jn|C:\Program+Files+(x86)\Graphviz2.38\bin|7i85s|或您在那里安装Graphviz的任何其他路径。|8rrup|我们不仅在Graphviz上有问题，而且在Jupyter中使用的其他外部EXE文件也有问题。|4rm33|原因是当jupyter想要导入一个包时，它会在工作目录中查找它，当它找不到包时，它会返回这样的错误。|fujbg|我们能做的是解决这个问题，如下所示：|fq3bt|1)检查您的系统上是否安装了Graphviz，如果没有，可以从以下位置下载并安装：|82jq4|https://graphviz.gitlab.io/|6hqdo|_|fc5dp|页面/下载/下载|ej78i|c3cv2|windows.html|f3se1|83c78|然后安装它。安装Graphviz时，请记住安装位置(在哪个文件夹中)。如果您在使用以下命令时看到上述错误|dhec9|import+graphviz|code-block|syntax|javascript|3aje8|然后，您有几个选项：|fhsrr|2)可以通过以下方式调用ipynb中的.exe文件|agcfi|import+os
os.environ["PATH"]+%2B=+os.pathsep+%2B+r'the+Graphviz+bin+file+address+on+your+system'|3h7ct|根据我的经验，它只适用于我正在使用的同一ipynb，每次我打开笔记本时，我都需要调用这几行代码。|cn43k|3)如果您想让Jupyter找到exe文件的位置，则需要设置环境路径。|fdi9a|在windows+10中，您可以执行以下操作：|6k56p|控制面板>系统和安全性>系统>高级系统设置>环境变量>路径>编辑>新建|fd7lv|然后在windows+8或更低版本中添加“系统上的Graphviz+bin文件地址”，转到：|oq1j|控制面板>系统和安全>系统>高级系统设置>环境变量|f4h5u|然后将；(分号)%2B“系统上的Graphviz+bin文件地址”添加到路径字符串的末尾|cfium|注意:记得重启你的机器。|5a47o|4)即使这不起作用，也要定义一个变量去：|4515s|控制面板>系统和安全>系统>高级系统设置>环境变量，然后：|ufsi|​|35oit|co0qj|?|atomic|offset|length|enido|fj1f9|9onnq|然后定义一个变量，如下所示：|4kkcf|3rt3t|8fi6e|a42np|9e1li|记住将变量命名为Graphviz。最后重启你的电脑，希望它能正常工作。^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0|0|0|0|0|1|1|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]|A|$2|3|4|5|6|$7|B|9|-4]]]|C|@$D|E|F|G|2|H|I|2X|J|@]|K|@]|6|$]]|$D|L|F|-4|2|H|I|2Y|J|@]|K|@]|6|$]]|$D|M|F|N|2|H|I|2Z|J|@]|K|@]|6|$]]|$D|O|F|N|2|H|I|30|J|@]|K|@]|6|$]]|$D|P|F|Q|2|H|I|31|J|@]|K|@]|6|$]]|$D|R|F|N|2|H|I|32|J|@]|K|@]|6|$]]|$D|S|F|N|2|H|I|33|J|@]|K|@]|6|$]]|$D|T|F|-4|2|H|I|34|J|@]|K|@]|6|$]]|$D|U|F|V|2|H|I|35|J|@]|K|@]|6|$]]|$D|W|F|X|2|H|I|36|J|@]|K|@]|6|$]]|$D|Y|F|Z|2|H|I|37|J|@]|K|@]|6|$]]|$D|10|F|11|2|H|I|38|J|@]|K|@]|6|$]]|$D|12|F|13|2|H|I|39|J|@]|K|@]|6|$]]|$D|14|F|15|2|H|I|3A|J|@]|K|@]|6|$]]|$D|16|F|17|2|H|I|3B|J|@]|K|@]|6|$]]|$D|18|F|19|2|H|I|3C|J|@]|K|@]|6|$]]|$D|1A|F|1B|2|H|I|3D|J|@]|K|@]|6|$]]|$D|1C|F|1D|2|H|I|3E|J|@]|K|@]|6|$]]|$D|1E|F|1B|2|H|I|3F|J|@]|K|@]|6|$]]|$D|1F|F|1G|2|H|I|3G|J|@]|K|@]|6|$]]|$D|1H|F|-4|2|H|I|3H|J|@]|K|@]|6|$]]|$D|1I|F|1J|2|H|I|3I|J|@]|K|@]|6|$]]|$D|1K|F|1L|2|1M|I|3J|J|@]|K|@]|6|$1N|1O]]|$D|1P|F|1Q|2|H|I|3K|J|@]|K|@]|6|$]]|$D|1R|F|1S|2|H|I|3L|J|@]|K|@]|6|$]]|$D|1T|F|1U|2|1M|I|3M|J|@]|K|@]|6|$1N|1O]]|$D|1V|F|1W|2|H|I|3N|J|@]|K|@]|6|$]]|$D|1X|F|1Y|2|H|I|3O|J|@]|K|@]|6|$]]|$D|1Z|F|20|2|H|I|3P|J|@]|K|@]|6|$]]|$D|21|F|22|2|H|I|3Q|J|@]|K|@]|6|$]]|$D|23|F|24|2|H|I|3R|J|@]|K|@]|6|$]]|$D|25|F|26|2|H|I|3S|J|@]|K|@]|6|$]]|$D|27|F|28|2|H|I|3T|J|@]|K|@]|6|$]]|$D|29|F|2A|2|H|I|3U|J|@]|K|@]|6|$]]|$D|2B|F|2C|2|H|I|3V|J|@]|K|@]|6|$]]|$D|2D|F|2E|2|H|I|3W|J|@]|K|@]|6|$]]|$D|2F|F|2G|2|H|I|3X|J|@]|K|@]|6|$]]|$D|2H|F|-4|2|H|I|3Y|J|@]|K|@]|6|$]]|$D|2I|F|2J|2|2K|I|3Z|J|@]|K|@$2L|40|2M|41|D|42]]|6|$]]|$D|2N|F|-4|2|H|I|43|J|@]|K|@]|6|$]]|$D|2O|F|2G|2|H|I|44|J|@]|K|@]|6|$]]|$D|2P|F|2Q|2|H|I|45|J|@]|K|@]|6|$]]|$D|2R|F|-4|2|H|I|46|J|@]|K|@]|6|$]]|$D|2S|F|2J|2|2K|I|47|J|@]|K|@$2L|48|2M|49|D|4A]]|6|$]]|$D|2T|F|-4|2|H|I|4B|J|@]|K|@]|6|$]]|$D|2U|F|2G|2|H|I|4C|J|@]|K|@]|6|$]]|$D|2V|F|2W|2|H|I|4D|J|@]|K|@]|6|$]]]]

Please note that I am using windows 10. some of the following may or may not applicable for other versions of windows or operating systems:
 
** Note 2: ** 
"the Graphviz bin file address on your system" can be C:\Program Files (x86)\Graphviz2.38\bin or any other path you installed Graphviz there. 
We have problem not only with Graphviz but also with other external EXE files we want to use in Jupyter. 
The reason is when jupyter wants to import a package it looks in working directory to find it and when it fails to find the package it returns such errors. 
What we can do is tackle this is as follows: 
1) check if the Graphviz is installed on your system and if not you can download and install it from: 

<a href="https://graphviz.gitlab.io/_pages/Download/Download_windows.html" rel="noreferrer">https://graphviz.gitlab.io/_pages/Download/Download_windows.html</a> 
 and then install it. When you installing Graphviz, keep in mind where (in which folder) you are installing it.
If you see the above error when you use 

<pre><code>import graphviz
</code></pre>

then you have several options: 

2) you can call the .exe file in the ipynb via 

<pre><code>import os
os.environ["PATH"] += os.pathsep + r'the Graphviz bin file address on your system'
</code></pre>

It is my experience that it is only works for the same ipynb that I am working with and every time that I open the notebook I need to call this lines of code.
 
3) If you want the Jupyter where to find the exe file, you need to set environmenal path. 
In windows 10 you can do this going to: 
Control Panel > System and Security > System > Advanced System Settings > Environment Variables > Path > Edit > New 
and then add the "the Graphviz bin file address on your system"
In windows 8 or lower go to : 
Control Panel > System and Security > System > Advanced System Settings > Environment Variables 
and then add the ;(semicolon) + "the Graphviz bin file address on your system" to the end of path string 
Note: remember to restart your machine.
 
4) and even this does not work, define a variable going to: 
Control Panel > System and Security > System > Advanced System Settings > Environment Variables and then: 

<a href="https://i.stack.imgur.com/yZdrk.png" rel="noreferrer"><img src="https://i.stack.imgur.com/yZdrk.png" alt="Start to define an environmental variable "></a>

Then define a variable as this:
<a href="https://i.stack.imgur.com/zHlPE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zHlPE.png" alt="Remember to name the variable Graphviz"></a>

Remember to name the variable Graphviz. At last restart your PC and hope it works.

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/ec0d07d34fea1db9a09fecb07d245f61.png|imageAlt|blocks|key|4otkt|text|请使用pydotplus代替pydot|unstyled|depth|inlineStyleRanges|entityRanges|2sne7|查找：|8v494|打开|41orl|找到1925行-+1972行，找到函数：|5pfp7|def+create(self，prog=None，format='ps')：|33aa8|在函数find中：|4bjr9|if+prog+not+in+self.progs:+if+not+os.path.exists(self.progs+)引发InvocationException(‘GraphViz’的可执行文件"%25s“未找到‘%25+prog)|3m2p8|编程|85cbc|)或\非os.path.isfile(self.progs|f5ba4|64ct|)：引发InvocationException(‘GraphViz’的可执行文件‘{}’不是‘’文件或不存在‘.’格式(self.progs|6och7|10q4d|))|c4aa6|在两个块之间添加以下内容(Graphviz的可执行文件路径)：|3iqfp|self.progs|5g8nk|1o9de|=“C:/程序文件(x86)/Graphviz2.38/bin/gvedit.exe"`|sble|添加后的结果为：|28osh|如果prog不在self.progs中:引发InvocationException(‘GraphViz’的可执行文件"%25s“未找到‘%25+prog)+self.progs|bj572|3hcco|=+"C:/Program+Files+(x86)/Graphviz2.38/bin/gvedit.exe“，如果不是os.path.exists(self.progs|9pcid|c3ph2|2ksq4|415hj|c2u0h|ctb3c|f44te|保存更改后的文件，即可成功运行。|fq8bc|你最好将它保存为bmp文件，因为png文件将不起作用。|6oknn|l3a5|?|atomic|offset|length|4ddpq|9091u|​^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|22|H|@]|I|@]|6|$]]|$B|J|D|K|2|F|G|23|H|@]|I|@]|6|$]]|$B|L|D|M|2|F|G|24|H|@]|I|@]|6|$]]|$B|N|D|O|2|F|G|25|H|@]|I|@]|6|$]]|$B|P|D|Q|2|F|G|26|H|@]|I|@]|6|$]]|$B|R|D|S|2|F|G|27|H|@]|I|@]|6|$]]|$B|T|D|U|2|F|G|28|H|@]|I|@]|6|$]]|$B|V|D|W|2|F|G|29|H|@]|I|@]|6|$]]|$B|X|D|Y|2|F|G|2A|H|@]|I|@]|6|$]]|$B|Z|D|W|2|F|G|2B|H|@]|I|@]|6|$]]|$B|10|D|11|2|F|G|2C|H|@]|I|@]|6|$]]|$B|12|D|W|2|F|G|2D|H|@]|I|@]|6|$]]|$B|13|D|14|2|F|G|2E|H|@]|I|@]|6|$]]|$B|15|D|16|2|F|G|2F|H|@]|I|@]|6|$]]|$B|17|D|18|2|F|G|2G|H|@]|I|@]|6|$]]|$B|19|D|W|2|F|G|2H|H|@]|I|@]|6|$]]|$B|1A|D|1B|2|F|G|2I|H|@]|I|@]|6|$]]|$B|1C|D|1D|2|F|G|2J|H|@]|I|@]|6|$]]|$B|1E|D|1F|2|F|G|2K|H|@]|I|@]|6|$]]|$B|1G|D|W|2|F|G|2L|H|@]|I|@]|6|$]]|$B|1H|D|1I|2|F|G|2M|H|@]|I|@]|6|$]]|$B|1J|D|W|2|F|G|2N|H|@]|I|@]|6|$]]|$B|1K|D|Y|2|F|G|2O|H|@]|I|@]|6|$]]|$B|1L|D|W|2|F|G|2P|H|@]|I|@]|6|$]]|$B|1M|D|11|2|F|G|2Q|H|@]|I|@]|6|$]]|$B|1N|D|W|2|F|G|2R|H|@]|I|@]|6|$]]|$B|1O|D|14|2|F|G|2S|H|@]|I|@]|6|$]]|$B|1P|D|1Q|2|F|G|2T|H|@]|I|@]|6|$]]|$B|1R|D|1S|2|F|G|2U|H|@]|I|@]|6|$]]|$B|1T|D|-4|2|F|G|2V|H|@]|I|@]|6|$]]|$B|1U|D|1V|2|1W|G|2W|H|@]|I|@$1X|2X|1Y|2Y|B|2Z]]|6|$]]|$B|1Z|D|-4|2|F|G|30|H|@]|I|@]|6|$]]|$B|20|D|21|2|F|G|31|H|@]|I|@]|6|$]]]]

Please use pydotplus instead of pydot

<ol>
<li>Find:<code>C:\Users\zhangqianyuan\AppData\Local\Programs\Python\Python36\Lib\site-packages\pydotplus</code></li>
<li>Open <code>graphviz.py</code></li>
<li>Find line 1925 - line 1972, find the function:

<pre><code>def create(self, prog=None, format='ps'):
</code></pre></li>
<li>In the function find: 

<pre><code>if prog not in self.progs:
 raise InvocationException(
 'GraphViz\'s executable "%s" not found' % prog)

if not os.path.exists(self.progs[prog]) or \
 not os.path.isfile(self.progs[prog]):
 raise InvocationException(
 'GraphViz\'s executable "{}" is not'
 ' a file or doesn\'t exist'.format(self.progs[prog])
 )
</code></pre></li>
<li>Between the two blocks add this(Your Graphviz's executable path):

<pre><code> self.progs[prog] = "C:/Program Files (x86)/Graphviz2.38/bin/gvedit.exe"`
</code></pre></li>
<li>After adding the result is:

<pre><code>if prog not in self.progs:
 raise InvocationException(
 'GraphViz\'s executable "%s" not found' % prog)

self.progs[prog] = "C:/Program Files (x86)/Graphviz2.38/bin/gvedit.exe"

if not os.path.exists(self.progs[prog]) or \
 not os.path.isfile(self.progs[prog]):
 raise InvocationException(
 'GraphViz\'s executable "{}" is not'
 ' a file or doesn\'t exist'.format(self.progs[prog])
 )
</code></pre></li>
<li>save the changed file then you can run it successfully.</li>
<li>you'd better save it as bmp file because png file will not work.
<img src="https://i.stack.imgur.com/XLRif.png" alt="picture is here"></li>
</ol>

entityMap|blocks|key|50ds6|text|我尝试了很多方法，这里是真正解决问题的方法它在windows8.1/10和python3上都有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|9rb0v|1.pip安装图形|9neme|2.所需的关键操作是通过以下步骤设置path变量：|9621k|a.控制面板>系统和安全>系统>高级系统设置>环境变量>路径>编辑b.添加“C：\Program+Files+(X86)\Graphviz2.38\bin”^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|I|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|J|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|K|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|L|9|@]|A|@]|B|$]]]]

Tried many ways and here is what really solved the problem - it worked for both windows 8.1/10 &amp; python 3 . 

1 . pip install graphviz 

2 . the key action needed is to set the path variable by following steps below: 

a. Control Panel > System and Security > System > Advanced System Settings > Environment Variables > Path > Edit
b. add 'C:\Program Files (x86)\Graphviz2.38\bin'

entityMap|blocks|key|6clq4|text|我不确定这是否是这个问题的答案，但这似乎也是“如何让graphviz在我的设置上运行？”线程。我也没看到|type|unstyled|depth|inlineStyleRanges|entityRanges|data|9hje1|随处可见。|3ou5r|因此:+Ubuntu+16.04，conda+Python+3.7，使用Jupyter+notebooks。|3hiff|conda+install+-c+anaconda+graphviz
conda+install+-c+conda-forge+python-graphviz|code-block|syntax|javascript|8eei9|图像不会在只尝试第一个命令后渲染；它们在运行第二个命令后渲染。|9mng4|我还安装了|1ft8k|，但在行为、性能或图像分辨率方面没有看到任何变化。^0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|R|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|S|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|T|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|U|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|V|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|W|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|X|9|@]|A|@]|B|$]]]]

I am not sure if this is an answer to THIS question, but this also seems to be the "how do I get graphviz to run on my setup?" thread. I also did not see <code>python-graphviz</code> mentioned anywhere.

As such:
Ubuntu 16.04, conda Python 3.7, using Jupyter notebooks.

<pre><code>conda install -c anaconda graphviz
conda install -c conda-forge python-graphviz
</code></pre>

The images would not render after trying only the first command; they did render after running the second.

I also installed <code>pydot-plus</code>, but did not see any change in behavior, performance, or image resolution.

entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/0ba957314994129a6b10c24488f9a5d5.png|imageAlt|blocks|key|7s2jt|text|我尝试设置环境变量。不起作用。我在Windows环境中结合以上方法对我起作用：|unstyled|depth|inlineStyleRanges|entityRanges|fsp75|下载graphviz-2.38.zip，下载地址：|6a1pq|https://graphviz.gitlab.io/|donec|_|3o87b|页面/下载/下载|d87l8|8qbfl|windows.html|5kdps|已将解压缩的文件夹复制到C:\Users|4lh4n|\\|7eb97|AppData\Local\Continuum\anaconda3\pkgs\Graphviz2.38|do6mb|我在代码中调用了Graphviz位置|49rc|构建分类器|3jjqb|以数据集的形式导入sklearn.datasets从sklearn.tree导入DecisionTreeClassifier+iris=datasets.load中的熊猫作为pd|6oun8|1imjr|iris()+df=pd.DataFrame(iris.data，columns=iris.feature|f72i4|fnddv|名称)+y=iris.target+dtree=DecisionTreeClassifier()+dtree.fit(df，y)|ciq4k|构建树|74tvo|从sklearn.externals.six导入StringIO从IPython.display导入图像从sklearn.tree导入导出|426h3|6bd1i|graphviz导入pydotplus导入graphviz导入os+os.environ|e8sq0|[|6li9m|“路径”|5a5gg|]|3t8tk|%2B=+os.pathsep+%2B+'C:/Users/tstusr/AppData/Local/Continuum/anaconda3/pkgs/Graphviz2.38/bin‘点|fn043|b0bq5|数据=+StringIO()导出|52o1j|58uho|graphviz(dtree，out|8djr6|aafr2|file=dot|cs989|blne3|数据、filled=True、rounded=True、特殊|6fn2n|44rfd|characters=True)图=+pydotplus.graph|3c85v|6a9mn|来自|b3fce|fmoqr|点|chv|f5ufm|数据(点|a6602|9u2cj|data.getvalue())图像(graph.create|fsq75|66fua|png()|4k72i|下面是树的外观：|9mabl|​|4rrr6|4490p|?|atomic|offset|length|e0tac|dv67j^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]]|A|@$B|C|D|E|2|F|G|2X|H|@]|I|@]|6|$]]|$B|J|D|K|2|F|G|2Y|H|@]|I|@]|6|$]]|$B|L|D|M|2|F|G|2Z|H|@]|I|@]|6|$]]|$B|N|D|O|2|F|G|30|H|@]|I|@]|6|$]]|$B|P|D|Q|2|F|G|31|H|@]|I|@]|6|$]]|$B|R|D|O|2|F|G|32|H|@]|I|@]|6|$]]|$B|S|D|T|2|F|G|33|H|@]|I|@]|6|$]]|$B|U|D|V|2|F|G|34|H|@]|I|@]|6|$]]|$B|W|D|X|2|F|G|35|H|@]|I|@]|6|$]]|$B|Y|D|Z|2|F|G|36|H|@]|I|@]|6|$]]|$B|10|D|11|2|F|G|37|H|@]|I|@]|6|$]]|$B|12|D|13|2|F|G|38|H|@]|I|@]|6|$]]|$B|14|D|15|2|F|G|39|H|@]|I|@]|6|$]]|$B|16|D|O|2|F|G|3A|H|@]|I|@]|6|$]]|$B|17|D|18|2|F|G|3B|H|@]|I|@]|6|$]]|$B|19|D|O|2|F|G|3C|H|@]|I|@]|6|$]]|$B|1A|D|1B|2|F|G|3D|H|@]|I|@]|6|$]]|$B|1C|D|1D|2|F|G|3E|H|@]|I|@]|6|$]]|$B|1E|D|1F|2|F|G|3F|H|@]|I|@]|6|$]]|$B|1G|D|O|2|F|G|3G|H|@]|I|@]|6|$]]|$B|1H|D|1I|2|F|G|3H|H|@]|I|@]|6|$]]|$B|1J|D|1K|2|F|G|3I|H|@]|I|@]|6|$]]|$B|1L|D|1M|2|F|G|3J|H|@]|I|@]|6|$]]|$B|1N|D|1O|2|F|G|3K|H|@]|I|@]|6|$]]|$B|1P|D|1Q|2|F|G|3L|H|@]|I|@]|6|$]]|$B|1R|D|O|2|F|G|3M|H|@]|I|@]|6|$]]|$B|1S|D|1T|2|F|G|3N|H|@]|I|@]|6|$]]|$B|1U|D|O|2|F|G|3O|H|@]|I|@]|6|$]]|$B|1V|D|1W|2|F|G|3P|H|@]|I|@]|6|$]]|$B|1X|D|O|2|F|G|3Q|H|@]|I|@]|6|$]]|$B|1Y|D|1Z|2|F|G|3R|H|@]|I|@]|6|$]]|$B|20|D|O|2|F|G|3S|H|@]|I|@]|6|$]]|$B|21|D|22|2|F|G|3T|H|@]|I|@]|6|$]]|$B|23|D|O|2|F|G|3U|H|@]|I|@]|6|$]]|$B|24|D|25|2|F|G|3V|H|@]|I|@]|6|$]]|$B|26|D|O|2|F|G|3W|H|@]|I|@]|6|$]]|$B|27|D|28|2|F|G|3X|H|@]|I|@]|6|$]]|$B|29|D|O|2|F|G|3Y|H|@]|I|@]|6|$]]|$B|2A|D|2B|2|F|G|3Z|H|@]|I|@]|6|$]]|$B|2C|D|O|2|F|G|40|H|@]|I|@]|6|$]]|$B|2D|D|2E|2|F|G|41|H|@]|I|@]|6|$]]|$B|2F|D|O|2|F|G|42|H|@]|I|@]|6|$]]|$B|2G|D|2H|2|F|G|43|H|@]|I|@]|6|$]]|$B|2I|D|O|2|F|G|44|H|@]|I|@]|6|$]]|$B|2J|D|2K|2|F|G|45|H|@]|I|@]|6|$]]|$B|2L|D|2M|2|F|G|46|H|@]|I|@]|6|$]]|$B|2N|D|2O|2|F|G|47|H|@]|I|@]|6|$]]|$B|2P|D|-4|2|F|G|48|H|@]|I|@]|6|$]]|$B|2Q|D|2R|2|2S|G|49|H|@]|I|@$2T|4A|2U|4B|B|4C]]|6|$]]|$B|2V|D|-4|2|F|G|4D|H|@]|I|@]|6|$]]|$B|2W|D|2O|2|F|G|4E|H|@]|I|@]|6|$]]]]

I tried setting up Environment variable. Didn't work.I am in Windows environment
Combining above methods worked for me :

<ol>
<li>Downloaded graphviz-2.38.zip from <a href="https://graphviz.gitlab.io/_pages/Download/Download_windows.html" rel="nofollow noreferrer">https://graphviz.gitlab.io/_pages/Download/Download_windows.html</a></li>
<li>Copied the extracted folder into C:\Users\\AppData\Local\Continuum\anaconda3\pkgs\Graphviz2.38</li>
<li>I called the Graphviz location in my code

<h3>Build the classifier</h3>

<pre><code>import sklearn.datasets as datasets
import pandas as pd
from sklearn.tree import DecisionTreeClassifier
iris=datasets.load_iris()
df=pd.DataFrame(iris.data, columns=iris.feature_names)
y=iris.target

dtree=DecisionTreeClassifier()
dtree.fit(df,y)
</code></pre>

<h3>Build the tree</h3>

<pre><code>from sklearn.externals.six import StringIO 
from IPython.display import Image 
from sklearn.tree import export_graphviz
import pydotplus
import graphviz
import os
os.environ\["PATH"\] += os.pathsep + 'C:/Users/tstusr/AppData/Local/Continuum/anaconda3/pkgs/Graphviz2.38/bin'

dot_data = StringIO()
export_graphviz(dtree, out_file=dot_data, 
 filled=True, rounded=True,
 special_characters=True)
graph = pydotplus.graph_from_dot_data(dot_data.getvalue()) 
Image(graph.create_png())
</code></pre>

<h3>Here is how the tree looks:</h3></li>
</ol>

<a href="https://i.stack.imgur.com/h5XbS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/h5XbS.png" alt="enter image description here"></a>

entityMap|blocks|key|90v6i|text|在尝试通过pydotplus和graphviz创建决策树时，我也遇到了同样的问题。并用路径变量的方法解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|cl13a|下面是我使用的确切步骤：|29l9t|虽然我已经通过conda+install命令获得了graphviz，但我从下面的路径重新下载了最新的包。|11g8u|https://graphviz.gitlab.io/|1i6cj|_|77c2l|页面/下载/下载|ff8q5|9tkii|windows.html|21hrq|下载:graphviz+2.38.zip(稳定版)|590cf|已将解压缩的文件夹复制到C:驱动器上的以下路径下。C:\Program+Files+(x86)\|9ivvk|修改了系统path变量，并在其中添加了以下路径。路径变量:控制面板>系统与安全>系统>高级系统设置>环境变量>路径C：\程序文件(x86)\graphviz-2.38\release\bin；|2sp54|将上述路径添加到环境变量后，重新启动系统。|83kp0|它工作得很好，我能够将决策树创建到png中。|50dgt|90m9d|在此处输入图像描述^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|12|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|13|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|14|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|15|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|16|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|17|9|@]|A|@]|B|$]]|$2|M|4|J|6|7|8|18|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|19|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1A|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|1B|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|1C|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|1D|9|@]|A|@]|B|$]]|$2|X|4|Y|6|7|8|1E|9|@]|A|@]|B|$]]|$2|Z|4|-4|6|7|8|1F|9|@]|A|@]|B|$]]|$2|10|4|11|6|7|8|1G|9|@]|A|@]|B|$]]]]

I had faced same problem while trying to create decision tree through pydotplus and graphviz. And used the path variable method to resolve this issue. 

Below are the exact steps I used:

<ol>
<li>Although I already had graphviz through conda install command , I re-downloaded the latest package from below path.
<a href="https://graphviz.gitlab.io/_pages/Download/Download_windows.html" rel="nofollow noreferrer">https://graphviz.gitlab.io/_pages/Download/Download_windows.html</a>
Downloaded : graphviz-2.38.zip (Stable Release)</li>
<li>Copied the extracted folder under following path on C: Drive.
C:\Program Files (x86)\</li>
<li>Modified the system path variable and added following path to it.
Path Variable : Control Panel > System and Security > System > Advance system Setting > Environment Variable > Path
C:\Program Files (x86)\graphviz-2.38\release\bin;</li>
<li>After adding above path to environment variable , restarted the system.</li>
<li>It worked fine , and I was able to create Decision tree into png. 

<a href="https://i.stack.imgur.com/ljotO.png" rel="nofollow noreferrer">enter image description here</a></li>
</ol>

entityMap|blocks|key|3ks4n|text|我在Jupyter+Notebook中遇到了同样的问题。加上这个，你就可以开始了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|flk6i|import+os

os.environ['PATH']+=+os.environ['PATH']%2B';'%2Bos.environ['CONDA_PREFIX']%2Br"\Library\bin\graphviz"|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

I encountered the same problem in Jupyter Notebook.
Add this, and you are good to go.
<pre><code>import os

os.environ['PATH'] = os.environ['PATH']+';'+os.environ['CONDA_PREFIX']+r&quot;\Library\bin\graphviz&quot;
</code></pre>

entityMap|blocks|key|20c5o|text|我在这个问题上被困了很长一段时间，但过了一段时间后，我找到了一个解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dgffl|pip安装图形|7ahrp|conda安装graphviz|8cd3i|现在，再次从=>安装graphviz|810sl|https://graphviz.org/|1nv8t|_|9ll36|页面/下载/下载|8hucr|frpd7|windows.html|964ff|(+msi文件)|a0ea8|安装完成后，设置路径=>+C:\Program+Files+(x86)\Graphviz2.38\bin；^0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|V|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|W|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|X|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|Y|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|Z|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|10|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|11|9|@]|A|@]|B|$]]|$2|O|4|L|6|7|8|12|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|13|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|14|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|15|9|@]|A|@]|B|$]]]]

I was stuck for a very long time at this problem but after sometime I found a solution:
<ul>
<li>pip install graphviz</li>
<li>conda install graphviz</li>
<li>Now again, install graphviz from =&gt; <a href="https://graphviz.org/_pages/Download/Download_windows.html" rel="nofollow noreferrer">https://graphviz.org/_pages/Download/Download_windows.html</a> (The msi file)</li>
<li>After setup is complete set path =&gt; C:\Program Files (x86)\Graphviz2.38\bin;</li>
</ul>

entityMap|blocks|key|6ulr0|text|对于所有在windows+10中遇到这个问题的人，即使在尝试了上述步骤之后，这对我也是有效的-对于试图调试相同错误的Windows+10用户，请以管理员身份启动CMD+(重要！)然后运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1qoou|然后运行|f6bar|这解决了我的问题^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|H|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|I|9|@]|A|@]|B|$]]]]

For all those who are facing this issue in windows 10 even after trying the above mentiond steps, this worked for me -
For Windows 10 users trying to debug this same error, launch CMD as administrator (important!) and run <code>dot -c</code> and then run <code>dot -v</code> 
This fixed the issue for me

entityMap|blocks|key|83usc|text|对于这个问题，对我有效的最简单的解决方案(Windows+10，Jupyter+Notebook)是这样做的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8b3jn|pip安装图形|cjiks|重新启动jupyter|aqeag|将以下代码放入notebook并执行：|7fu4p|导入sys+sys.path.append('C:/Users/usrname/AppData/Local/Continuum/anaconda3/Library/bin/graphviz/')^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|L|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|M|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|N|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|O|9|@]|A|@]|B|$]]]]

The simplest solution which worked for me (Windows 10, Jupyter Notebook) for this problem is to do the following:
<ol>
<li>pip install graphviz</li>
<li>restart jupyter</li>
<li>Put the following code in notebook and execute:</li>
</ol>
<blockquote>
<pre><code>import sys

sys.path.append('C:/Users/usrname/AppData/Local/Continuum/anaconda3/Library/bin/graphviz/')
</code></pre>
</blockquote>

entityMap|blocks|key|f9ecq|text|这是我使用的最新解决方案:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|e44v2|我也有同样的问题，我正在使用Anaconda和Jupyter+Notebook。|5ql6c|为了解决这个问题，我所做的并不是从互联网上安装Graphiz.zip！|ecfd0|我只做了以下几个步骤：|d9d8i|使用>>__创建新环境|i1a8|在这个新环境中安装graphviz+lib：>>|43sdm|5m3f3|我在notebook单元格中写下这几行，然后运行它|1o828|38kh8|最后，图像出现了，我为此做了一个小聚会，因为它花了我3天的时间:(^0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|S|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|T|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|U|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|V|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|W|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|X|9|@]|A|@]|B|$]]|$2|M|4|-4|6|7|8|Y|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|Z|9|@]|A|@]|B|$]]|$2|P|4|-4|6|7|8|10|9|@]|A|@]|B|$]]|$2|Q|4|R|6|7|8|11|9|@]|A|@]|B|$]]]]

This is the fresh solution I've used :)
I got the same problem, I'm using Anaconda and Jupyter Notebook.
What I did to solve this problem is NOT to install Graphiz.zip from the intenet!
I just did these steps:
<ol>
<li>Create a new environment using &gt;&gt;<code>conda create -n [env_name]</code></li>
<li>install graphviz lib inside this new env: &gt;&gt; <code>conda install graphviz</code></li>
<li>I wrote this lines in the notebook cell and run it <code>import os os.environ['PATH'] = os.environ['PATH']+';'+os.environ['CONDA_PREFIX']+r&quot;\Library\bin\graphviz&quot;</code></li>
</ol>
Finally, The image is appeared, I made a small party for this because it took 3 days from me :(

entityMap|blocks|key|bp2qe|text|尝试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|9fhi6|import+os

os.environ['PATH']=os.environ['PATH']%2B';'%2Bos.environ['CONDA_PREFIX']%2Br"\Library\bin\graphviz"|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Try
<pre class="lang-py prettyprint-override"><code>import os

os.environ['PATH']=os.environ['PATH']+';'+os.environ['CONDA_PREFIX']+r&quot;\Library\bin\graphviz&quot;
</code></pre>

entityMap|blocks|key|co560|text|对于我(Windows10%2B+Pycharm2020)来说，这是可行的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4mcqk|添加|8pgup|到路径(到Graphviz二进制文件的路径)|7nn7u|重新启动|4rln1|-也许重新启动PyCharm就足够了^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|K|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|L|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|M|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|N|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|O|9|@]|A|@]|B|$]]]]

For me (Windows 10 + Pycharm2020) this worked:
<ul>
<li>Added <code>C:\Program Files\Graphviz\bin</code> to PATH (path to Graphviz binaries)</li>
<li>Reboot - Maybe PyCharm restart would be enough</li>
</ul>

I am running Python3.4 on Windows 7. I am trying to use the Python interface for graphviz. This is a script I intend to run:

<pre><code>from graphviz import Digraph
import pydotplus

dot = Digraph(comment='The Round Table')

dot.node('A', 'King Arthur')
dot.node('B', 'Sir Bedevere the Wise')
dot.node('L', 'Sir Lancelot the Brave')
dot.edges(['AB', 'AL'])
dot.edge('B', 'L', constraint='false')

print(dot.source)
dot.render('test-output/round-table.gv', view=True)
</code></pre>

I get the following error at runtime: 

<pre><code>RuntimeError: failed to execute ['dot', '-Tpdf', '-O', 'test-output/round-table.gv'], make sure the Graphviz executables are on your systems' path
</code></pre>

Now I am sure I have properly installed the correct dependencies. I first tried to set the correct environment variables. The graphviz executables are located at C:\Program Files (x86)\Graphviz2.37\bin so I went to the Environment Variables section. There are two sections there: User Variables and System Variables. Under System Variables I clicked on Path and then clicked <code>Edit</code> and added ;C:\Program Files (x86)\Graphviz2.37\bin to the end of the string and saved. This didn't clear the error.

Then, following the answer <a href="https://stackoverflow.com/questions/18438997/why-is-pydot-unable-to-find-graphvizs-executables-in-windows-8">given here</a> I uninstalled pydot (actually I use pydotplus here) and re-installed it again, but still no success. 

I have been trying for hours to fix this and the whole PATH variable thing is just confusing and frustrating.

Graphviz's executables are not found (Python 3.4)

集成开发环境

Windows

Python

Ubuntu

 我在Windows7上运行Python3.4。我正在尝试使用Python接口进行graphviz。这是我打算运行的脚本： from graphviz import Digraphimport pydotplusdot = Digraph(comment='The Round Table')dot.node('A', ...

问找不到Graphviz的可执行文件(Python 3.4)
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