Convert image to txt file representation

ImageConvert.py

from PIL import Image

def getStr(grayscale):
  if (grayscale >= 230.0):
    return ' '
  if (grayscale >= 200.0):
    return '.'
  if (grayscale >= 180.0):
    return '*'
  if (grayscale >= 160.0):
    return ':'
  if (grayscale >= 130.0):
    return 'o'
  if (grayscale >= 100.0):
    return '&'
  if (grayscale >= 70.0):
    return '8'
  if (grayscale >= 50.0):
    return '#'
  return '@'

def getInverseStr(grayscale):
  if (grayscale >= 230.0):
    return '@'
  if (grayscale >= 200.0):
    return '#'
  if (grayscale >= 180.0):
    return '8'
  if (grayscale >= 160.0):
    return '&'
  if (grayscale >= 130.0):
    return 'o'
  if (grayscale >= 100.0):
    return ':'
  if (grayscale >= 70.0):
    return '*'
  if (grayscale >= 50.0):
    return '.'
  return ' '

def convertImage(str, w=140, h=140):
  im = Image.open(str, 'r')
  im.thumbnail((w, h))
  width, height = im.size
  data = list(im.getdata())
  textImage = ''
  negative = True

  for (idx, pix) in enumerate(data):
    if (idx % width == 0) :
      textImage +='\n'

    grayscale = pix[0] * 0.2989 + pix[1] * 0.5870 + pix[2] * 0.1140
    textImage += getInverseStr(grayscale) if negative else getStr(grayscale)

  file = open('out.txt','w') 
  file.write(textImage) 
  file.close() 
  
 
def main():
   convertImage('1200px-Alessandro_Del_Piero_in_2014.jpg')
 
if __name__ == '__main__':
   main()