介绍
介绍
福哥今天要给大家介绍一个专门绘制流程图的工具库，它就是大名鼎鼎的graphviz，这个graphviz库的强大之处在于，我们完全不需要费时费力地去计算流程图的每个节点应该放在哪里，连线又应该如何走，这些最最最繁琐的事情它帮我们做了，而我们需要做的仅仅是设计节点以及哪些节点之间需要建立连线，仅此而已。
下面就跟着福哥一起学习如何在Windows上面使用graphviz库设计流程图吧~~
安装
graphviz库
直接通过pip安装即可！
pip install graphviz
体验
简单测试
福哥写一个简单的程序来测试一下~~
from graphviz import Digraph graph = Digraph( engine="circo", comment="福哥测试", format="png" ) nodeTexts = ["福哥","鬼谷子叔叔"] nodeFontName = "SimSun" graph.node(nodeTexts[0], fontname=nodeFontName) graph.node(nodeTexts[1], fontname=nodeFontName) graph.edge(nodeTexts[0], nodeTexts[1], "就是", fontname=nodeFontName) graph.view()
方形节点
这个圆形的节点不好看？我们给它改成方形的。
from graphviz import Digraph graph = Digraph( engine="circo", comment="福哥测试", format="png" ) nodeTexts = ["福哥","鬼谷子叔叔"] nodeFontName = "SimSun" graph.node(nodeTexts[0], shape="box", fontname=nodeFontName) graph.node(nodeTexts[1], shape="box", fontname=nodeFontName) graph.edge(nodeTexts[0], nodeTexts[1], "就是", fontname=nodeFontName) graph.view()
边框颜色、背景银色、字体颜色
黑白太素了？福哥给它们加上颜色，就好看了！
from graphviz import Digraph graph = Digraph( engine="circo", comment="福哥测试", format="png" ) nodeTexts = ["福哥","鬼谷子叔叔", "同福"] nodeFontName = "SimHei" graph.node(nodeTexts[0], shape="box", color="orange", fontcolor="black", fontname=nodeFontName) graph.node(nodeTexts[1], shape="box", color="brown", fontcolor="white", style="filled", fillcolor="brown", fontname=nodeFontName) graph.node(nodeTexts[2], shape="box", color="#C95858", fontcolor="white", style="filled", fillcolor="#9E37D9", fontname=nodeFontName) graph.edge(nodeTexts[0], nodeTexts[1], "就是", fontname=nodeFontName) graph.edge(nodeTexts[1], nodeTexts[2], "也是", fontname=nodeFontName) graph.view()
总结
今天福哥带着童鞋们学习了在Windows上面搭建graphviz运行环境的方法，还学习了graphviz库的基本使用技巧，有了这些经验我们就完全可以通过编写Python程序来制作漂亮的流程图了。
下一课我们会学习如何在Linux系统上面搭建graphviz运行环境，敬请期待~~