Running to plays in one playbook

Question

I want to run two plays in a single playbook. I want them to run in chronological order. The first play adds some new entries in the inventory file by making new group and the second play uses the new inventory file to run its tasks.

It run successfully if I execute them separately, but I want them in the same group.

Here's My play:

---
 - name: ec2
   hosts: localhost
   connection: local
   roles:
   - launchEc2
 - hosts: ansible
   gather_facts: Fasle
   become: yes   
   roles:
   - python

OUTPUT:

PLAY [ec2] *********************************************************************

TASK [setup] *******************************************************************
ok: [127.0.0.1]

TASK [launchEc2 : include_vars] ************************************************
ok: [127.0.0.1]

TASK [launchEc2 : Launch new ec2 instance] *************************************
changed: [127.0.0.1]

TASK [launchEc2 : Add ec2 ip to the hostgroup] *********************************
changed: [127.0.0.1] => (item={.....})

TASK [launchEc2 : wait for SSh to come up] *************************************
ok: [127.0.0.1] => (item={.....})

PLAY [ansible] *****************************************************************

TASK [python : install python] *************************************************
skipping: [34.203.228.19]

PLAY RECAP *********************************************************************
127.0.0.1                  : ok=5    changed=2    unreachable=0    failed=0   
34.203.228.19              : ok=0    changed=0    unreachable=0    failed=0

Answer 1

The inventory file is loaded before a playbook is executed. What's happening is, your second play is using the same inventory file to execute itself. 

As a workaround you can try to run refresh_inventory after you update it, but I'm not entirely sure that it'll work.