How to fetch a particular pattern using regular expression in Robot Framework?

Question

I have a scenario where I need to fetch a particular pattern from the string using regular expression.

The string looks like below:

${text} = Slot 0   l  5  3  24+6 
          Slot 1   l  3 16  10
          Slot 3   l  4  3  32
          Slot 8   l  2  3 
          Slot 9   l  1  3

Here, I need to fetch only

Slot 0 Slot 1 Slot 3 Slot 8 Slot 9

How do I do this?

I have tried using the keywords 'Replace String Using Regexp' and 'Get Regexp Matches' for the same.

${text}=  String.Replace String Using Regexp  ${response}   [^Slot\\s+\\d], ${EMPTY}

The result was:

${text} = Slot 0 l 5 3 24+6 Slot 1 l 3 16 10 Slot 3 l 4 3 32 Slot 8 l 2 3 Slot 9 l 1 3 –

And, Get Regexp Matches gives the below result:

${matches}=   String.Get Regexp Matches  ${response}    [Slot\\s+\\d]

The result:

${matches}=   ['S', 'l', 'o', 't', ' ', '0', ' ', ' ', ' ', 'l', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '5', ' ', '3', ' ', ' ', '2', '4', '+', '6', '\r', '\n', 'S', 'l', 'o', 't', ' ', '1', ' ', ' ', ' ', 'l', ' ', ' ... –

What have you tried, show the effort you've put in solving it yourself. Don't just expect it'll be solved by someone else for you - the community will help and guide, but the purpose is hardly doing something instead of you. I'd recommend using this site trying out the different options - regex101.com , select the python flavor in it. — Todor Minakov
– Todor Minakov, Commented May 18, 2017 at 7:12
I have tried in number of ways. I have also used pythex.org also for this. When I have not found the solution for this, I wanted to know if there is some one who can have a solution for it. — Kavya
– Kavya, Commented May 18, 2017 at 7:30
You're on the right track, but spin it otherwise - use the keyword Get Regexp Matches to get just the substrings you're interested in; the regexp is also ok, just don't negate it like in your removal approach. And add your comment, plus any further results in the question's body ;) — Todor Minakov
– Todor Minakov, Commented May 18, 2017 at 7:38
In your second attempt, remove the square brackets, and you're there! From regex101 hints - [] Matches a single character from the list - you don't need that, you want a match on the whole substring. — Todor Minakov
– Todor Minakov, Commented May 18, 2017 at 7:40
Please delete your KEYWORD comments (they are fairly unreadable) and add them into the question via the edit feature, thanks. — halfer
– halfer, Commented May 18, 2017 at 8:26

Kavya · Accepted Answer · 2017-05-18 11:50:20Z

2

The solution is just to remove the square brackets used for the regular expression in 'Get Regexp Matches' keyword.

i.e., Use Slot\s+\d+ instead of [Slot\s+\d+]

This is because [] Matches a single character from the list and my requirement was to fetch the whole substring.

Thanks @Todor

answered May 18, 2017 at 11:50

Kavya

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