Optimization, Operations Research, Python, Data Science, Editors Pick.
a given color. class Color: index: int n_nodes: int def __init__(self, index) -> None: self.index = index self.n_nodes = 0 def __repr__(self): return f"C{self.index}" def add_node(self): self.n_nodes = self.n_nodes + 1 Now the class Node. Each instance of Node has an attribute neighbors which is a