正則表達式從文件中的行中提取第一組數字

Question

我在這里寫了這段代碼，我想提取粗體數字（第一次出現）進行比較。

- lineinfile:
    path: /bin/animals.txt
    state: absent
    regexp: '(?i)^\s*chicken\s+[0-9]+\s*$'
  check_mode: yes
  register: egg
- name: comparing number
  debug:
    msg: "chicken lays {{egg}} egg today."
  when: egg > 0

animals.txt 里面（例子）

雞下了53個蛋，吃了 4 個蟲。

更新添加了反向引用

- lineinfile:
    path: /bin/animals.txt
    state: absent
    backrefs: yes
    regexp: '(?i)chicken\D*(\d+)'
  check_mode: yes
  register: egg
- name: comparing number
  debug:
    msg: "chicken lays {{egg}} egg today."
  when: egg > 0