Ansible task to update pip

update_pip.yaml

- name: get the pip version
  command: pip --version
  register: pip_version
  ignore_errors: True

- name: fetch pip installer
  get_url:
      url: https://bootstrap.pypa.io/get-pip.py
      dest: /tmp/get-pip.py
  when: pip_version|failed

- name: install pip
  command: python /tmp/get-pip.py
  when: pip_version|failed

I got error:

PLAY [all] *********************************************************************

TASK [fetch pip installer] *****************************************************
fatal: [fake-aws]: FAILED! => {"failed": true, "msg": "The conditional check 'pip_version|failed' failed. The error was: |failed expects a dictionary\n\nThe error appears to have been in '/home/pj/work/devops/ansible/common.yaml': line 22, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: fetch pip installer\n ^ here\n"}