Jump on specific line in txt file

Question

I have a big text file and I want to open it and jump on a line that contains a specific string. What I managed to do is jump on a specific line number.

import os
os.system('sudo gedit +50 test.txt')

How can i edit the code so that it searches for a specific string instead of a line number?

Answer 1

You can invoke the line as first ocurrence of text that are you looking for with next line:

   gedit +$(grep -n "id" test.txt  | head -n 1 | cut -f 1 -d ':')  test.txt

This grep -n "text_to_find" test.txt | head -n 1 | cut -f 1 -d ':' grep -n "text_to_find" test.txt | head -n 1 | cut -f 1 -d ':' grep -n "text_to_find" test.txt | head -n 1 | cut -f 1 -d ':' means:

1. grep ... Tell me all lines where there are "test_to_find" and prefix with line number
2. head ... : get first occurrence
3. cut ... get the line number

You have to fix it in case that there are not ocurrences

Answer 2

You're not really going to be able to open the file and jump straight to a line, without first doing some logic to figure where that line is.

This should do the trick:

with open('test.txt', 'r') as myFile:
    for line in myFile:
        if 'My Search String Here' in line:
            print line

You may also want to look at this: https://docs.python.org/2/library/linecache.html