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OOP & classes

Classes, instances, methods, dataclasses, and object-oriented design in Python.

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OOP & classes easy

Graph Class with Adjacency Dict in Python

Build an undirected graph class using a dictionary of adjacency lists with methods to add vertices, edges, remove edges, and query neighbors.

graph oop adjacency-list
Python 
class Graph:
    def __init__(self):
        self.adjacency = {}

    def add_vertex(self, vertex):
        if vertex not in self.adjacency:
            self.adjacency[vertex] = []

    def add_edge(self, u, v):
        self.add_vertex(u)
        self.add_vertex(v)
        self.adjacency[u].append(v)
        self.adja…
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