Question

I have a very large (~8 gb) text file that has very long lines. I would like to pull out lines in selected ranges of this file and put them in another text file. In fact my question is very similar to this and this but I keep getting stuck when I try to select a range of lines instead of a single line.

So far this is the only approach I have gotten to work:

lines = readin.readlines()
out1.write(str(lines[5:67]))
out2.write(str(lines[89:111]))

However this gives me a list and I would like to output a file with a format identical to the input file (one line per row)

Answer 1

You can call join on the ranges.

lines = readin.readlines()
out1.write(''.join(lines[5:67]))
out2.write(''.join(lines[89:111]))