Let's use the A* algorithm to solve a maze. Consider the following figure:

The # symbols indicate obstacles. The symbol o represents the starting point and x represents the goal. Our goal is to find the shortest path from the start to the end point. Let's see how to do it in Python. The following solution is a variant of the solution provided in the simpleai library. Create a new Python file and import the following packages:

import math 
from simpleai.search import SearchProblem, astar 

Create a class that contains the methods needed to solve the problem:

# Class containing the methods to solve the maze 
class MazeSolver(SearchProblem): 

Define the initializer method:

    # Initialize the class  
    def __init__(self, board): 
      self.board = board 
      self.goal = (0, 0) 

Extract the initial and final positions:

        for y in range(len(self.board)):
            for x in range(len(self.board[y])):
          ...