import zlib import struct filename = "misc34.png" with open(filename, 'rb') as f: all_b = f.read() #w = all_b[16:20] #h = all_b[20:24] for i in range(901,1200): name = str(i) + ".png" f1 = open(name,"wb") im = all_b[:16]+struct.pack('>i',i)+all_b[...