Jinja Selectattr: How to Filter a List of Dictionaries with Jinja

Rick Donato

Nov 4, 2024 1 min read

Jinja Tip!
Use selectattr to filter a list of dictionaries based on a matching condition.

# Input data
interfaces: 
  - { device: 'spine1', interface: 'GigabitEthernet0/0', ip: '10.1.1.1' }
  - { device: 'spine1', interface: 'GigabitEthernet0/1', ip: '10.1.2.1' }
  - { device: 'spine2', interface: 'GigabitEthernet0/0', ip: '10.2.1.1' }
  - { device: 'spine2', interface: 'GigabitEthernet0/1', ip: '10.2.2.1' }

# Jinja syntax
{{ interfaces | selectattr('device', 'equalto', "spine1") | list | pprint }}

# Result 
[{'device': 'spine1', 'interface': 'GigabitEthernet0/0', 'ip': '10.1.1.1'},
 {'device': 'spine1', 'interface': 'GigabitEthernet0/1', 'ip': '10.1.2.1'}]

Try it yourself