try to extract binary plist from other files

bplistExtractor.py

import struct
import sys

def parser(data,base):
    offset_size, object_ref_size, number_of_objects, top_object, table_offset = struct.unpack('!6xBB4xI4xI4xI', data[base:base+32])
    size = 0x20 + offset_size * number_of_objects + table_offset
    start = base - (size - 0x20)
    # if start < 0:
    #     print(hex(start))
    #     return 
    try:
        if data[start:start+8] == b"bplist00":
            # print(hex(start))
            with open(str(hex(start))+".bplist","wb") as f:
                f.write(data[start:start+size])
            return 
        else:
            return 
    except:
        print("error")
        return 

args = sys.argv
print(args[1])
with open(args[1],"rb") as f:
    fdata = f.read()
print("size is {}".format(str(len(fdata))))
for idx in range(len(fdata)-32):
    parser(fdata,idx)