Split a texfiles

split.py

import sys

def split_file(filename, num_max_lines=None):
	num_lines = 0
	with open(filename) as f:
		for line in f:
			num_lines += 1
			sys.stdout.write(line)
			if num_max_lines and num_lines >= num_max_lines:
				break

if __name__ == '__main__':
	argv = sys.argv[1:]
	if len(argv) == 1:
		split_file(argv[0])
	elif len(argv) == 2:
		split_file(argv[0], int(argv[1]))
	else:
		print('Usage: split.py <FILENAME> <NUM-MAX-LINES>')