Show BMP on console - Python Programming Exercise

# Python program to decode and display a Netpbm image (P1 format) from a file

def decode_netpbm(file_path):
    try:
        # Open the Netpbm file
        with open(file_path, 'r') as file:
            # Read the first line (P1 header)
            header = file.readline().strip()
            if header != 'P1':
                print("Error: This is not a valid P1 Netpbm image.")
                return
            
            # Skip comment lines (if present)
            while True:
                line = file.readline().strip()
                if line and not line.startswith('#'):
                    # This is the line with image dimensions (width and height)
                    width, height = map(int, line.split())
                    break
            
            # Read and display the pixel data
            print(f"Image dimensions: {width}x{height}")
            print("Image Data:")
            for _ in range(height):
                row = file.readline().strip().split()
                # Convert 0 to 'White' and 1 to 'Black' and display it
                print(' '.join('Black' if pixel == '1' else 'White' for pixel in row))
    
    except FileNotFoundError:
        print(f"Error: The file '{file_path}' was not found.")
    except Exception as e:
        print(f"Error: {str(e)}")

# Example usage
decode_netpbm('image.pbm')

 Output

Example Input (image.pbm):

P1
# This is an example bitmap of the letter "J"
6 10
0 0 0 0 1 0
0 0 0 0 1 0
0 0 0 0 1 0
0 0 0 0 1 0
0 0 0 0 1 0
0 0 0 0 1 0
1 0 0 0 1 0
0 1 1 1 0 0
0 0 0 0 0 0
0 0 0 0 0 0

Example Output:

Image dimensions: 6x10
Image Data:
White White White White Black White
White White White White Black White
White White White White Black White
White White White White Black White
White White White White Black White
White White White White Black White
Black White White White Black White
White Black Black Black White White
White White White White White White
White White White White White White