Finding 9 characters before a particular string in Python [closed]

Question

Closed. This question needs details or clarity. It is not currently accepting answers.

Want to improve this question? As written, this question is lacking some of the information it needs to be answered. If the author adds details in comments, consider editing them into the question. Once there's sufficient detail to answer, vote to reopen the question.

Closed 5 years ago.

The community is reviewing whether to reopen this question as of 5 years ago.

Improve this question

For example here I have a line '2020-08-12 13:45:04 0.86393 %contrastWeber' and I need to extract 9 characters before ' %contrastWeber' string in text file. So, here my answer will be '0.86393'. I don't understand how to do it in Python? please help

Why not just use a simple regex search: "(.{9})%contrastWeber" — paddy
– paddy, Commented Aug 20, 2020 at 3:52
Welcome! Give this a read for detail on asking questions. For more help here, I suggest you update your answer with text output of the above image, things you've tried, researched, and ultimately, a little more detail. — Jason R Stevens CFA
– Jason R Stevens CFA, Commented Aug 20, 2020 at 3:57
Convert the string to list using str.split(" ") and then find index of %contrastWeber in list. Then the text you want shall be at index 1 less than previous index you found. — thisisjaymehta
– thisisjaymehta, Commented Aug 20, 2020 at 4:12

Shaker al-Salaam · Accepted Answer · 2020-08-20 04:22:28Z

0

line = '2020-08-12 13:45:04 0.86393 %contrastWeber'

position = line.index('%contrastWeber')

if position >= 0:
    starting = position - 9
    if starting < 0:
        starting = 0
    ending = position
    print(line[starting : ending])
else:
    print('is not found')

answered Aug 20, 2020 at 4:22

Shaker al-Salaam

162 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Finding 9 characters before a particular string in Python [closed]

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related