Simple B&W PPM Viewer in terminal

PPMViewerGimp.py

# /bin/python3
# Terminal PPM preview loader Quick'n'Dirty
# Print to terminal a preview of a PPM file in black and white generated by gimp
# Like:
# 100
# 010
# 001
# Usage: script.py <ppm file>

import sys

def converter(filein):

  exported = ""
  current_file = open(filein, 'r')
  content = []
  for word in current_file.readlines():
    current_content = word.strip()
    content.append(current_content)
  # Get size
  size = content[2].split(" ")
  size_x = int(size[0])
  size_y = int(size[1])
  # Remove P3 and Made with gimp
  content = content[4:]
  
  # Remove unwanted content value
  content = ["1" if content[x] == "0" else "0" for x in range(0, len(content), 3)]

  # Parse content
  for y in range(size_y):
    for x in range(size_x):
      exported +=  "" + content[x + y * size_y]
    exported += "\n"

  return exported


if __name__ == '__main__':
  print(converter(sys.argv[1]))