python log函數轉成call graph

[shihyuyao]

enter main test.c:85
enter func1 test.c:70
enter func2 test.c:67
leave func2 test.c:67
enter func3 test.c:75
enter func4 test.c:80
leave func4 test.c:80
leave func3 test.c:75
leave func1 test.c:70
enter func3 test.c:75
enter func4 test.c:80
leave func4 test.c:80
leave func3 test.c:75
leave main test.c:85

怎么透过函数 enter and leave 转成下面 dot 格式 ？

digraph G {
node [peripheries=2 style="filled,rounded" fontname="Vera Sans YuanTi Mono" color="#eecc80"];
rankdir=LR;
label="test.c"
main [shape=box];
node [color="#eecc80" shape=ellipse];edge [color="#eecc80"];
main->func1
node [color="#ccee80" shape=octagon];edge [color="#ccee80"];
func1->func2
node [color="#ccee80" shape=octagon];edge [color="#ccee80"];
func1->func3
node [color="#80ccee" shape=hexagon];edge [color="#80ccee"];
func3->func4
node [color="#eecc80" shape=ellipse];edge [color="#eecc80"];
main->func3
}