Custom NPC extractor

Python script for extracting npc file into txt and bmp files

import gzip



def filenameend(i):

    if i == 2:

        return ".bmp"

    elif i == 3:

        return ".txt"

    elif i == 4:

        return "_face.bmp"



name = input("Enter filename? ")

with open(name + '.npc', 'rb') as original:

    for i in range(1,5):

        bytes = original.read(40)

        bytes = original.read(10)

        if bytes[0:1] == b'':

            break

        j = 9

        while j > 0 and bytes[j:j+1] == b'\00':

            j -= 1

        jump = int(bytes[0:j+1])

        bytes = original.read(jump-50)

        if (i > 1):

            filename = name + filenameend(i)

            with open(filename, 'wb') as file:

                file.write(bytes)

            bytes = bytearray()

            with gzip.open(filename, 'rb') as f:

                bytes = f.read()

            with open(filename, 'wb') as f:

                f.write(bytes)