artificial intelligence - Index 1 is out of bounds for axis 0 in size 1 in Python

Question

For a university assignment I was asked to convert a 1 line text file into a 2d array. However, when I run the program, I get this error:

(venv) D:Uni StuffYear 2AIGPAssignmentPYTHONASSIGNMEN>python astar.py
Input file name: Lab9TerrainFile1.txt
Traceback (most recent call last):
  File "D:Uni StuffYear 2AIGPAssignmentPYTHONASSIGNMENastar.py", line 129, in <module>
    main()
  File "D:Uni StuffYear 2AIGPAssignmentPYTHONASSIGNMENastar.py", line 110, in main
    number_of_rows = maze_file[1]
IndexError: index 1 is out of bounds for axis 0 with size 1

This is the code for generating the maze:

def main():

    maze_file = open(input("Input file name: "), "r").readlines()

    maze_file = np.array([maze_file])

    number_of_columns = maze_file[0]

    number_of_rows = maze_file[1]

    maze_column = np.array_split(maze_file[2:8], number_of_columns)

    maze_row = np.array_split(maze_file[2:8], number_of_rows)

    maze = np.concatenate([maze_column][maze_row])

    start = np.where(maze == 2)

    end = np.where(maze == 3)

    maze_file.close()

    path = astar(maze, start, end)
    print(path)

Any help would be appreciated and thank you!

Answer 1

You can test this by checking the size of your array maze_file by running the code below.

print(len(maze_file))

If it returns 1, then it means it only has 1 element.

maze_file[0] means you are getting the first element. Hence, the index 0 between the square brackets. When you specify maze_file[1], its trying to get the 2nd element, which doesn't exists. Hence the error Index out of Bounds.

Reviewing your code, it looks like you are trying to get the number of columns and rows for the array. You can use the following code.

number_of_columns = len(maze_file)
number_of_rows = len(maze_file[0])