def make_img_name(file_ext='.png'):
 fn = []
 for i in range(0, 30):
  fn.append(choice(ALPHABET))
 return (''.join(fn) + file_ext)

def make_img_name ( file_ext = '.png' ) : fn = [ ] for i in range ( 0 , 30 ) : fn . append ( choice ( ALPHABET ) ) return ( '' . join ( fn ) + file_ext )
generate a random file name .