new_contents: import sys
  import random
  import math
  
  def make_glitch(filename, output):
  	fr = open(filename, 'rb')
  	ba = None
  	try:
  		ba = bytearray(fr.read())
  	finally:
  		fr.close()
  	fr.close()
  	
  	glitches = random.randint(1, 100)
  	
  	glitch_count = dict()
  	
  	for i in range(glitches):
  		glitch_type = random.randint(1, 3)
  		size = random.randint(1, 3)
  		byte = random.randint(math.ceil(len(ba)*1/4), len(ba) - size)
  		if glitch_type == 1: # remove
  			glitch_count["remove"] = glitch_count.get("remove",0) + 1
  			for j in range(size):
  				del ba[byte]
  		elif glitch_type == 2: # zero
  			glitch_count["zero"] = glitch_count.get("zero",0) + 1
  			for j in range(size):
  				ba[byte+j] = 0
  		elif glitch_type == 3: # shift
  			glitch_count["shift"] = glitch_count.get("shift",0) + 1
  			for j in range(size):
  				if ba[byte+j] == 255:
  					ba[byte+j] = 0
  				else:
  					ba[byte+j] += 1
  	
  	print output + " count: " + ", ".join([k + ": "+ str(v) for k, v in glitch_count.iteritems()])
  	
  	fw = open(output, 'wb')
  	fw.write(ba)
  	fw.close()
  
  if __name__ == "__main__":
  	if len(sys.argv) < 2:
  		print "Usage: " + sys.argv[0] + " [filename]"
  		sys.exit(-1)
  	filename = sys.argv[1]
  	for i in range(10):
  		make_glitch(filename, filename[:filename.rfind('.')] + ("_%s.jpg" % (str(i+1))))
  	sys.exit(0)
subject: Add simple jpg glitch