Use hashlib (or other deterministic hash lib) to make the figure reproducible?

[wrvsrx]

I notice that running task2dot twice doesn't produce same figure because of the indeterministic hash function. Changing __hash__ function in Node and Edge to following function makes the figure reproducible (My implementation is poor, it's just a hint). Would you consider making the figure reproducible?

class Node:

    def __hash__(self):
        return secHash(self.kind + self.label)

class Edge:

    def __hash__(self):
        return secHash(str(self.node1) + str(self.node2))

Where secHash is defined as

from hashlib import sha256 

def secHash(s : str):
    return int(sha256(s.encode()).hexdigest(), base=16)