Following worked for me
('{{ iplist | join('\',\'') }}')
Ex:
Inventory
[ips]
1.1.1.1
2.2.2.2
3.3.3.3
#cat temp.sh.j2
"ips": (ip='{{ groups['zoo'] | join('\',\'') }}')
result:
#cat temp.sh
"ips": (ip='1.1.1.1','2.2.2.2','3.3.3.3')
Hope it would help someone.