do you have an idea to optimize this code[recursion]]?

[netanelst]

class y():
    

    def __init__(self, id, d="", indicator="",type="",deleted=False,published_date=0,last_updated=0,reports=[],actors=[],
    malware_families=[''],kill_chains=[''],ip_address_types=[],domain_types=[],malicious_confidence='',labels=[l('',time.time(),time.time())],relations=[]):
        self.id=id
        self.indicator=indicator
        self.type=type
        self.deleted=deleted
        self.published_date=datetime.datetime.fromtimestamp(published_date).strftime("%b %d %Y %H:%M:%S")
        self.last_updated=datetime.datetime.fromtimestamp(last_updated).strftime("%b %d %Y %H:%M:%S")
        self.reports=reports
        self.actors=actors
       # self.recursive_indicator=recursive_indicator()
        self.relations=relations
        self.d=y.recursive_indic6ator(self.relations)
        ix=0
        self.relations=y(y.recursive_indic6ator(indicator))
    def c2(ix,l={}):
        s=y.recursive_indic6ator(l)
        ix=ix+5
        if(ix<55):
            return s
    def recursive_indic6ator(i={},ix=20):
        ix=ix+5
        if(ix<55):
                    return y(i)