[ansible-project] To list the target host's name and it's IP address using facts

[Pandu jh]

I need to list the target host's name and IP address using set_fact. Below 
is my playbook, but it's giving error.

  hosts:  all
  tasks:
    - set_fact:
        data:  "{{ ansible_all_ipv4_addresses }}"
    - set_fact:
        ip: "{{ data.split(',')  }}"

    - name: Show the devices
      shell: echo {{ item }} >> /tmp/ips
      with_items: "{{  blockdevices  }}"

Desired o/p is 
 host1 : 172.168.1.21
 system2:  172.168.1.22

Anybody help me to fix this pls ? thanks in advance

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