remove whitespace before letters using regex

Asked May 27 '19 at 07:11

Active May 27 '19 at 07:56

Viewed 57 times

I want to remove starting white spaces from the certain letters and numbers. It is a string. I tried using strip() and regex sub but it fails.

Here the text:

2019-05-23 10:51 IST
  192.168.1.1 (192.168.1.1)

  192.168.1.2 (192.168.1.2)

  192.168.1.3 (192.168.1.3)

  android-eb20919729f10e96 (192.168.1.4)

  maheshkumar-thinkpad-t410 (192.168.1.5)

  kavin-t420 (192.168.1.7)

  smackcoders (192.168.1.8)


 (7 hosts up) scanned in 22.99 seconds

I used this code but fails:

data = re.sub(r'^[a-z]*', ' ',my_data)

I want it like this:

2019-05-23 10:51 IST
192.168.1.1 (192.168.1.1)

192.168.1.2 (192.168.1.2)

192.168.1.3 (192.168.1.3)

android-eb20919729f10e96 (192.168.1.4)

maheshkumar-thinkpad-t410 (192.168.1.5)

kavin-t420 (192.168.1.7)

smackcoders (192.168.1.8)


(7 hosts up) scanned in 22.99 seconds

edited May 27 '19 at 07:56

petezurich

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asked May 27 '19 at 07:11

Smack Alpha

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Have you written any code for this? – Devesh Kumar Singh May 27 '19 at 07:11
data = re.sub(r'^[a-z]*', ' ',data)... used this but fails – Smack Alpha May 27 '19 at 07:12
Please mention it in the question, and add what fails and why – Devesh Kumar Singh May 27 '19 at 07:13
For removing whitespace from the start of string you just need this `re.sub(r'(?m)^\s*', '', string)` – Pushpesh Kumar Rajwanshi May 27 '19 at 07:15
If you want to remove leading spaces or tabs and keep the empty lines in between use `^[ \t]+` and replace with an empty string. – The fourth bird May 27 '19 at 07:16
If you have a large file it makes sense to read it line by line and apply `.lstrip()` to each line. – Wiktor Stribiżew May 27 '19 at 07:32

remove whitespace before letters using regex

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