Problems with Jinja2 and ansible making a sub dict - ansible

Question

I need to read a csv file with diferent IPs and make a dictionary with a jinja2 filter for modificate the IP depending the IPNumber value. The yml file is like:
- read_csv:
path: vms.csv
key: Number
fieldnames: Name,IP1,IP2,IP3,IP4,IPNumber
delimiter: ';'
register: vms
- name: vms to dict
debug:
msg:
- {{'Name':{{ item.value.Name }},
{% if item.value.IPNumber == "1" %}
'IP':{{ item.value.IP1 }},
{% endif %}
{% if item.value.IPNumber == "2"%}
'IP':{{ item.value.IP2 }},
{% endif %}
{% if item.value.IPNumber == "3"%}
'IP':{{ item.value.IP3 }},
{% endif %}
{% if item.value.IPNumber == "4"%}
'IP':{{ item.value.IP4 }},
{% endif %}}}
loop: "{{ vms.dict | dict2items }}"
register: vms2
But I get the error:
The error appears to be in '/etc/ansible/roles/vms.yml': line 17, column 16, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
'Name':{{ item.value.Name}},
{% if item.value.IPNumber == "1" %}
^ here
I know is a syntax problem but I dont guess where the problem is.
I need some help.

Answer 1

The following task should create your dictionary as per your requirement inside a var you can reuse elsewhere. Rename my_ip_dict to whatever suits your project better.
- name: Create my IP dictionary
set_fact:
my_ip_dict: >-
{{
my_ip_dict | default({})
| combine({item.value.Name: item.value['IP' + item.value.IPNumber]})
}}
loop: "{{ vms.dict | dict2items }}"
- name: Check the result:
debug:
var: my_ip_dict
Note that I have dropped all the if/else structures by calling directly the correct field depending on IPNumber. I took for granted it always has a value in the valid scope or the other existing IP* fields. If this is not the case, you can always default that value e.g. item.value['IP' + item.value.IPNumber] | default('N/A')

Answer 2

You should put only variables/expressions within {{ or {%. To me 'Name' looks like normal text and should be outside.
Example:
# Notice the quotes `"` symbol at the beginning and end of debug message
- debug:
msg:
- "Name: {{ item.value.Name }},
{% if item.value.IPNumber == "1" %}
IP: {{ item.value.IP1 }}
# and so on...
{% endif %}"
This at least should address the error message.