请给出一个ansible-playbook 内含多个子任务

好的，这是一个简单的ansible playbook，它包含多个子任务：

---
- name: deploy web app
  hosts: web_servers
  become: yes

  tasks:
    - name: install dependencies
      apt:
        name: ['git', 'python3-pip', 'nginx']
        state: present

    - name: clone app repository
      git:
        repo: git://github.com/user/repo.git
        dest: /var/www/app
        version: master

    - name: install app dependencies
      pip:
        requirements: /var/www/app/requirements.txt

    - name: configure nginx
      template:
        src: /etc/nginx/nginx.conf.j2
        dest: /etc/nginx/nginx.conf
        owner: root
        group: root
        mode: 0644
      notify: restart nginx

  handlers:
    - name: restart nginx
      service:
        name: nginx
        state: restarted

这个playbook用于在web服务器上部署一个web应用程序，它包含以下子任务：
1. 安装依赖项
2. 克隆应用程序存储库
3. 安装应用程序依赖项
4. 配置nginx

此外，还定义了一个处理程序，用于在配置nginx文件后重启nginx服务。