Using python to write specific lines from one file to another file

Question

I have ~200 short text files (50kb) that all have a similar format. I want to find a line in each of those files that contains a certain string and then write that line plus

Answer 1

I think your problem is the tabs of the bottom file.

You need to indent from if Lines[i] until after i=i+1 such as:

while i < 500:
    if Lines[i] == searchquery:
        f2.write(Lines[i])
        f2.write(Lines[i+1])
        f2.write(Lines[i+2])
        i = i+1
    else:
        i = i+1