extract_streets.py
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extract_streets.py
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	#!/usr/bin/env python3

	# -------------------------------------------------------------
	# FANTOIR — Extract streets
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Created: 2017-11-14
	# License: Trivial work, not eligible to copyright
	# Data license: FANTOIR is licensed under Licence Ouverte
	# -------------------------------------------------------------

	import sys


	def extract_streets(filename_source, filename_out):
	with open(filename_out, 'w') as output,\
	open(filename_source, 'r') as input:
	for line in input:
	# Streets and other « voies » are the record where
	# the 109th position (« type de voie ») is 1.
	try:
	if line[108] == "1":
	output.write(line)
	except IndexError:
	pass


	if __name__ == "__main__":
	argc = len(sys.argv)
	if (argc != 3):
	print("Usage: {} <FANTOIR filename> <street filename>"
	.format(sys.argv[0]),
	file=sys.stderr)
	sys.exit(1)

	extract_streets(sys.argv[1], sys.argv[2])