Use less to page output

python-less-pager.py

import subprocess
import sys
import os

def output_to_pager(text):
    try:
        # args stolen fron git source, see `man less`
        pager = subprocess.Popen(['less', '-F', '-R', '-S', '-X', '-K'],
                                 stdin=subprocess.PIPE,
                                 stdout=sys.stdout)
        for line in text:
            pager.stdin.write("{}{}".format(line, os.linesep))
        pager.stdin.close()
        pager.wait()
    except KeyboardInterrupt:
        pass
        # let less handle this, -K will exit cleanly