N Demo Handler

import reclass Demo:    def __init__(self, demo="0:0"):        self.set(demo)    def __delitem__(self, key):        if isinstance(key, int):            start, stop = key, key+1        elif isinstance(key, slice):            start, stop = key.start, key.stop        self.demo = self.demo[:start] + self.demo[stop:]        self.length = len(self.demo)    def __iter__(self):        return iter(map(lambda n: int(n, 16), list(self.demo)))    def __getitem__(self, key):        return self.demo[key]    def __len__(self):        return self.length    def __nonzero__(self):        return self.length != 0    def __setitem__(self, key, value):        if isinstance(key, int):            start, stop = key, key+1        elif isinstance(key, slice):            start, stop = key.start, key.stop        self.demo = self.demo[:start] + value + self.demo[stop:]        self.length = len(self.demo)    def __str__(self):        return self.demo    def decode(self, demo=None):        if demo == None:            demo = self.demo        # self.demo pads to 7 characters, so dividing its length        # by 7 will always yield an integer        fragment_count = len(demo) / 7        fragment_list = [str(int(demo[i*7:(i+1)*7][::-1], 16))                         for i in range(fragment_count)]        return str(self.length) + ':' + '|'.join(fragment_list)    def set(self, demo):        if self.validate(demo):            if ':' in demo:                # format is 18:0|35782656|35791394|0                self.length = int(demo.split(':')[0])                self.demo = ''.join(                    [("%07X" % (int(fragment)))[::-1]                     for fragment in demo.split(":")[1].split("|")])            else:                # format is 0111C5540                self.length = len(demo)                self.demo = demo        else:            raise Exception("Failed to set demo data: " + demo)    def validate(self, demo):        return re.match("^\d+:\d+(\|\d+)*$", demo) or \               re.match("^[0-9A-Fa-f]+$", demo)if __name__ == "__main__":    # Demonstration    mydemo = Demo("148:35791392|107405858|107374182|71582788|71582788|89408580|89478485|17895765|17895697|17895697|17895697|17895697|17895697|17895697|17895697|17895697|219222289|219223381|89478485|18175317|17|0")    print mydemo,          '\n\n', \          mydemo.length,   '\n\n', \          mydemo.decode(), '\n\n', \          list(mydemo),    '\n\n', \          mydemo[5],       '\n\n', \          mydemo[5:40],    '\n'    # Use bitwise AND to see if each frame has the player holding jump    print ''.join(['j' if frame & 4 else '.' for frame in mydemo])    mydemo[15:25] = '0000000000'    print mydemo[5:40]    del mydemo[15:25]    print mydemo.length    print mydemo[5:40]    print 'Not null' if mydemo else 'Null'    mydemo.set('0:0')    print 'Not null' if mydemo else 'Null'