Ansible Filter Plugin: Filter dicts by lambda

filter_dict.py

# ---
# - hosts: 'localhost'
#   gather_facts: 'no'
#   tasks:
#     - set_fact:
#         ports:
#           Ethernet0:
#             ip: '10.0.0.1'
#             description: 'csw11'
#           Ethernet1:
#             ip: '10.0.0.21'
#             description: ''
#         lambda_string: "lambda x: x[1]['description'] == ''" # x is a (key, value) tuple of the input dict
#     - debug:
#         msg: "{{ ports | filter_dict(lambda_string) | list }}"

def filter_dict(dictionary, lambda_string):
  return dict(filter(eval(lambda_string), dictionary.items()))

class FilterModule(object):
  def filters(self):
    return {
      'filter_dict' : filter_dict
    }