IOS–like "section" command

section.py

#!/usr/bin/env python3

import sys

if len(sys.argv) <= 1:
	print('usage: %s <search text>' % sys.argv[0], file=sys.stderr, flush=True)
	sys.exit(1)

search = ' '.join(sys.argv[1:])

search_indent = -1

for line in sys.stdin:

	line_indent = len(line) - len(line.lstrip())

	line = line.rstrip()

	if search_indent >= 0 and line_indent > search_indent and len(line) > 0:
		print(line)
	else:
		search_indent = -1

	if search in line:
		search_indent = line_indent
		print(line)