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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 _copy_script_migrated(self, filename, id_=-1, file_type=SCRIPT_FILE_TYPE):
 """Upload a script to a migrated JSS's database. On a "migrated" JSS, scripts are POSTed to the JSS. Pass an id if you wish to associate the script with an existing Script object, otherwise, it will create a new Script object. Args: filename: Path to script file. id_: Int ID of Script object to associate this file with. Default is -1, which creates a new Script. """

        basefname = os.path.basename(filename)

        resource = open(filename, "rb")
        headers = {"DESTINATION": "1", "OBJECT_ID": str(id_), "FILE_TYPE":
                   file_type, "FILE_NAME": basefname}
        response = self.connection["jss"].session.post(
            url="%s/%s" % (self.connection["jss"].base_url, "dbfileupload"),
            data=resource, headers=headers)
        return response