[Python] Finding starts, ends, and loops with pydot

Is there a way to achieve this in pydot?

Take the following example:

[Outputted Dot File]

strict graph g{
"A" -> "B";
"B" -> "C";
"C" -> "D";
"D" -> "E";
}


[Python]

print(num.start)
>>> A
print(num.steps)
>>> ["a,b","b,c","c,d","d,e"]
print(num.end)
>>> E


or with the following case:

[Outputted Dot File]

strict graph g{
"A" -> "B";
"B" -> "C";
"C" -> "A";
}


[Python]

if num["A"] == num.loop:
print("[%s] loop detected")%(num["A"])

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