split for data manitpulation

[Veera]

Hi,

I have this playbook to print the columns  5 and 6 using the debug.

---
- name: playbook to print columns
  hosts: localhost
  gather_facts: no
  vars:
    myline: This line is a test, two, three, four, five, 6, seven
  tasks:
    - name: play to  print
      debug:
        msg:
          - "{{ myline.split(',')[5] }}"
          - "{{ myline.split(',')[6] }}"

It prints the details , But is there a way to print the columns  4,7 and 11 with a single split option. (instead of listing under msg: )

 - name: play to  print
      debug:
        msg:  "{{ myline.split(',')[4][7][11] }}"

Do split accepts only one square bracket[] parameter? 

 

          

[dulh...@mailbox.org]

> Do split accepts only one square bracket[] parameter?

 

the python aquivalent (something similar to this should be happening in the backgound) would be:

 

   >>> myline = 'This line is a test, two, three, four, five, 6, seven'

   >>> print(myline.split(',')[4], myline.split(',')[5], myline.split(',')[6])
   five 6 seven

 

as you do not have an index 11 your concrete example makes no big sense in that regards.

 

I neither found the correct ansible syntax to translate that mentioned python logic into a TASK example like yours though.

maybe someone else here can help out with that

 

 

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[Todd Lewis]

You have 6 delimiters, so only 7 fields. Your maximum index therefore is 6.

Setting that issue aside, you can use map(), like so:

    "{{ [2, 4, 5] | map('extract', myline.split(',')) }}"

Cheers,
--
Todd

[Veera]

Thanks  Todd. 

 I  got the desired output  and it answers the other thread also .

https://groups.google.com/g/ansible-project/c/ZqZuw3do-5g/m/hMlDvLceAQAJ   (Now I understand it is a string.. )

[Veera]

Hi Todd,

Is there a way to combine the 2 positional  values .

 "{{ [2, 4, 5] | map('extract', myline.split(',')) }}" 

as 

 "{{ [2, 4 5] | map('extract', myline.split(',')) }}" 

  to print  like below

  - two

 -  four five

I tried to combine .. but missing a bit

 "{{ [2, combine [4 5] | map('extract', myline.split(',')) }}" or  printing "two" as  a item and  "{{ [4 5] | map('extract', myline.split(',')) |combine }}"

or a different filter instead of combine can help?

On Tuesday, August 29, 2023 at 5:24:04 PM UTC+5:30 Todd Lewis wrote:

[Vladimir Botka]

On Sat, 14 Oct 2023 10:32:51 -0700 (PDT)
Veera <svee...@gmail.com> wrote:

> Is there a way to combine the 2 positional values ...

> to print like below
> - two
> - four five

Split the string and trim the items

arr: "{{ myline|split(',')|map('trim') }}"

gives

arr:
- This line is a test
- two
- three
- four
- five
- '6'
- seven

A list of lists the structure that describes what you want

s1_34: "{{ [[1], [3, 4]]|
map('map', 'extract', arr)|
map('join', ' ') }}"

gives

s1_34:

- two
- four five

You can substitute *arr* in *s1_34* if you want a 'one-liner'.


--
Vladimir Botka

[Veera]

Hi  Vladimir ,

I got it by using the  join  -  s1_34: "{{ [[1], [3, 4]]| map('map', 'extract', arr)| join(',')}