How to use comparison operators with dictionary values? - ansible

Question

I am trying to write a task that stores the dictionary values in variable based on the condition .
I'm new to this technology. Please anyone help on the below request.
I tried with the below code. Please check below.
- set_fact:
v1: "{{ v1|default([]) + item.keys() if item.values() == false else 1 }}"
loop: "{{ dv }}"
'dv' is a dictionary.
[{1A:True},{2A:True},{3A:False},{4A:False}]
Actually, here I'm trying to store false values in v1 by using comparison operators only.
Expected output:
v1 should contain following list:
[3A,4A]
Ansible Version: 2.5.15

Answer 1

Below works for me:
---
- hosts: localhost
vars:
dv:
1A: 'True'
2A: 'False'
3A: 'True'
4A: 'False'
tasks:
- name: debug
debug:
msg: "{{ item.value }}"
loop: "{{ dv | dict2items }}"
- set_fact:
v1: "{{ v1| default([]) + item.key if (item.value in 'False') else('') }}"
loop: "{{ dv | dict2items }}"
- debug:
var: v1
output -->
TASK [set_fact] *********************************************************************************************************
ok: [localhost] => (item={'key': u'1A', 'value': u'True'})
ok: [localhost] => (item={'key': u'3A', 'value': u'True'})
ok: [localhost] => (item={'key': u'2A', 'value': u'False'})
ok: [localhost] => (item={'key': u'4A', 'value': u'False'})
TASK [debug] ************************************************************************************************************
ok: [localhost] => {
"v1": "2A4A"
}

Answer 2

You can try the below code.
- hosts: localhost
connection: local
vars:
dv: [{1A:True},{2A:True},{3A:False},{4A:False}]
v2: []
v1: []
tasks:
- set_fact:
v1: "{{ v1|default([]) }} + [ {{ v1.append((item.keys()|first).split(':')[0]) if (item.keys()|first).split(':')[1] == 'False' else v2.append('1') }} ]"
with_items: "{{ dv }}"
- debug:
msg: "{{ v1 }}"
Here v2 is a variable declared to direct if the conditions are not met.
Output of the a above code is a below:
ok: [localhost] => {
"msg": [
"3A",
"4A"
]
}