Paginate Files via STDIN

paginate.py

#!/usr/bin/env python3

import sys
import math
import argparse

parser = argparse.ArgumentParser(
  description="Paginate the output of a file or command via STDIN\nExample: cat log.txt | paginate.py -p 2 -l 20\nAuthor:@butlerallenj"
)
parser.add_argument('-l', '--limit', type=int, default=50, help="The per page quantity to print out. Default: 50")
parser.add_argument('-p', '--page', type=int, default=1, help="The page number. Default: 1")
parser.add_argument('-t', '--total', action="store_true", default=False, help="Print total pages")

args = parser.parse_args()

begin = (args.limit * args.page) - args.limit
i = 0
item_count = 0

for line in sys.stdin:
    i += 1
    if i < begin or item_count >= args.limit:
        continue

    item_count += 1
    if not args.total:
        print(line.strip())

if args.total:
    total = math.ceil(i / args.limit)
    print("total_pages:{total}".format(total=total))