Graphviz格式:"jpeg"未识别 [英] Graphviz Format: "jpeg" not recognized

问题描述

运行以下代码(示例来自 https://pypi.org/project/graphviz/):

Running the following code (example from https://pypi.org/project/graphviz/):

from graphviz import Digraph
dot = Digraph(comment='The Round Table', format='jpeg')
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')
dot.render('test-output/round-table.gv', view=True) 

结果:

Format: "jpeg" not recognized. Use one of:

似乎graphviz无法将文件写入任何格式.该如何解决?

It seems like graphviz cannot write a file to any format. How to solve this?

推荐答案

我的方法:(我是win10，其他操作可能会跳到步骤2)

My method: (I'm win10, other op may skip to step 2)

1. 添加"bin/" Graphviz进入环境路径.

1. Add "bin/" of Graphviz into environment path.

• 我的Graphviz安装路径:D:\software\graphviz\Graphviz2.44.1\.它具有4个文件夹:"bin"，"include"，"lib"，"share"
• 因此我将D:\software\graphviz\Graphviz2.44.1\bin添加到我的环境路径中

• My Graphviz installation path: D:\software\graphviz\Graphviz2.44.1\. It has 4 folders: "bin","include","lib","share"
• So I add D:\software\graphviz\Graphviz2.44.1\bin to my environment path

cmd运行命令点-c"；进行配置.

cmd run command "dot -c" to config.

• dot表示D:\software\graphviz\Graphviz2.44.1\bin\dot.exe.由于步骤1，我只需要运行dot -c，否则，我需要运行D:\software\graphviz\Graphviz2.44.1\bin\dot.exe -c
• dot -c的意思是:配置插件(用可用的插件信息写$ prefix/lib/graphviz/config.需要写权限.)

• dot means D:\software\graphviz\Graphviz2.44.1\bin\dot.exe. Due to step 1, I just need to run dot -c, otherwise, I need to run D:\software\graphviz\Graphviz2.44.1\bin\dot.exe -c
• dot -c means: Configure plugins (Writes $prefix/lib/graphviz/config with available plugin information. Needs write privilege.)

添加代码路径:

# add
import os 
path_graphviz = "D:/software/graphviz/Graphviz2.44.1/bin" # replace by your Graphviz bin path
os.environ["PATH"] += os.pathsep + path_graphviz

# origin code
from graphviz import Digraph
dot = Digraph(comment='The Round Table', format='jpeg')
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')
dot.render('test-output/round-table.gv', view=True)

1. 我在计算机上取得了成功. 这是结果

1. I success on my computer. here is result

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