import sys

def python_to_bingbong(python_code):
    """
    Converts a string of Python code into its BingBong binary representation.
    """
    byte_array = python_code.encode('utf-8')
    binary_string = ''.join(f'{byte:08b}' for byte in byte_array)
    bingbong_code = binary_string.replace('0', '.').replace('1', ',')
    return bingbong_code

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python py_to_bingbong.py <python_file>")
        sys.exit(1)

    python_file = sys.argv[1]
    try:
        with open(python_file, 'r') as f:
            python_code = f.read()
        
        bingbong_code = python_to_bingbong(python_code)
        
        output_file = python_file.replace('.py', '.bb')
        with open(output_file, 'w') as f:
            f.write(bingbong_code)
            
        print(f"Successfully converted {python_file} to {output_file}")

    except FileNotFoundError:
        print(f"Error: File not found at '{python_file}'")
        sys.exit(1)