判断语句 之 逻辑运算

示例一：
等同于：

if ansible_distribution == "CentOS" and ansible_distribution_major_version == "7":
    print("我是centos7")

- hosts: all
  tasks:
  - name: debug
    debug:
      msg: "我是centos7"
    when:
    - ansible_distribution == "CentOS"
    - ansible_distribution_major_version == "7"

示例二：

not 取反

- hosts: all
  tasks:
  - name: debug
    debug:
      msg: "我不是centos6"
    when:
    - ansible_distribution == "CentOS"
    - not ansible_distribution_major_version == "6"