we have found square that has already been explored if maze[start_row][start_column=triedreturn false successan outside edge not occupied by an obstacle if maze is_exit(start_rowstart_column)maze update_position(start_rowstart_columnpart_of_pathreturn true maze update_position(start_rowstart_columntried otherwiseuse logical short circuiting to try each direction in turn (if neededfound search_from(mazestart_row start_columnor search_from(mazestart_row start_columnor search_from(mazestart_rowstart_column or search_from(mazestart_rowstart_column if foundmaze update_position(start_rowstart_columnpart_of_pathelsemaze update_position(start_rowstart_columndead_endreturn found as you look through the algorithm you will see that the first thing the code does (line is call update_position this is simply to help you visualize the algorithm so that you can watch exactly how the turtle explores its way through the maze next the algorithm checks for the first three of the four base caseshas the turtle run into wall (line )has the turtle circled back to square already explored (line )has the turtle found an exit (line )if none of these conditions is true then we continue the search recursively you will notice that in the recursive step there are four recursive calls to searchfrom it is hard to predict how many of these recursive calls will be used since they are all connected by or statements if the first call to searchfrom returns true then none of the last three calls would be needed you can interpret this as meaning that step to (row- ,column(or north if you want to think geographicallyis on the path leading out of the maze if there is not good path leading out of the maze to the north then the next recursive call is triedthis one to the south if south fails then try westand finally east if all four recursive calls return false then we have found dead end you should download or type in the whole program and experiment with it by changing the order of these calls the code for the maze class is shown below the __init__ method takes the name of file as its only parameter this file is text file that represents maze by using "+characters for wallsspaces for open squaresand the letter "sto indicate the starting position an example of maze data file could look as follows+++++++++++++++++++++++++++++++++++++++++++++++++++++++ recursion