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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def addDEX(self, filename, data, dx=None):
 """ Add a DEX file to the Session and run analysis. :param filename: the (file)name of the DEX file :param data: binary data of the dex file :param dx: an existing Analysis Object (optional) :return: A tuple of SHA256 Hash, DalvikVMFormat Object and Analysis object """

        digest = hashlib.sha256(data).hexdigest()
        log.debug("add DEX:%s" % digest)

        log.debug("Parsing format ...")
        d = DalvikVMFormat(data)
        log.debug("added DEX:%s" % digest)

        self.analyzed_files[filename].append(digest)
        self.analyzed_digest[digest] = filename

        self.analyzed_dex[digest] = d

        if dx is None:
            dx = Analysis()

        dx.add(d)
        dx.create_xref()

        # TODO: If multidex: this will called many times per dex, even if already set
        for d in dx.vms:
            # TODO: allow different decompiler here!
            d.set_decompiler(DecompilerDAD(d, dx))
            d.set_vmanalysis(dx)
        self.analyzed_vms[digest] = dx

        if self.export_ipython:
            log.debug("Exporting in ipython")
            d.create_python_export()

        return digest, d, dx