python中使用graphviz时，如果出现中文乱码，多半是因为没有设置fontname为支持中文显示的字体，只需要把node或者edge的fontname="Microsoft YaHei"，即可正常显示：

from graphviz import Digraph

digraph=Digraph("中文图片")

digraph.node(name="a",label="木",color="#00CD66",style="filled",fontcolor="white",fontname="Microsoft YaHei")
digraph.node(name="b",label="火",color="#FF4500",style="filled",fontcolor="white",fontname="Microsoft YaHei")
digraph.node(name="c",label="土",color="#CD950C",style="filled",fontcolor="white",fontname="Microsoft YaHei")
digraph.node(name="d",label="金",color="#FAFAD2",style="filled",fontcolor="#999999",fontname="Microsoft YaHei")
digraph.node(name="e",label="水",color="#00BFFF",style="filled",fontcolor="white",fontname="Microsoft YaHei")

digraph.edge("a","b",label="木生火",color="#FF6666",fontcolor="#FF6666",fontname="Microsoft YaHei")
digraph.edge("b","c",label="火生土",color="#FF6666",fontcolor="#FF6666",fontname="Microsoft YaHei")
digraph.edge("c","d",label="土生金",color="#FF6666",fontcolor="#FF6666",fontname="Microsoft YaHei")
digraph.edge("d","e",label="金生水",color="#FF6666",fontcolor="#FF6666",fontname="Microsoft YaHei")
digraph.edge("e","a",label="水生木",color="#FF6666",fontcolor="#FF6666",fontname="Microsoft YaHei")

digraph.edge("a","c",label="木克土",color="#333333",fontcolor="#333333",fontname="Microsoft YaHei")
digraph.edge("c","e",label="土克水",color="#333333",fontcolor="#333333",fontname="Microsoft YaHei")
digraph.edge("e","b",label="水克火",color="#333333",fontcolor="#333333",fontname="Microsoft YaHei")
digraph.edge("b","d",label="火克金",color="#333333",fontcolor="#333333",fontname="Microsoft YaHei")
digraph.edge("d","a",label="金克木",color="#333333",fontcolor="#333333",fontname="Microsoft YaHei")

digraph.view()