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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import argparse
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import csv
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import os
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import re
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import sys
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# CSV structure:
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# 0 empty
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# 1 iso country code
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# 2 city code
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# 3 full name
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# the rest is unused
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parser = argparse.ArgumentParser(description='''Find cities code from UNLOCODE.
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If the exact name is found when a country code is given, only this match will
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be shown, all the MATCHES are displayed otherwise. The font case isn’t taken in
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account but the accents are.''')
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parser.add_argument('--city', dest='city', type=str, required=True,
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help='City name, will be looked for inside the CSV files')
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parser.add_argument('--country', dest='country', type=str, required=False,
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default='', help='''Country name, in ISO-3166 format, to narrow queries if
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needed''')
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args = parser.parse_args()
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files = [file for file in os.listdir('.') if os.path.isfile(file)]
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if len(files) == 0:
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print('ERROR: No CSV file has been found.')
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sys.exit(1)
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def csvprocessing(city):
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"""Tries to find the wanted city code into the list `city`."""
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if (args.city.lower() == city[3].lower() and
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args.country.lower() == city[1].lower()):
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EXACT_MATCH.append(city)
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if args.city.lower() == city[3].lower() and len(args.country) == 0:
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MULTIPLE_MATCHES.append(city)
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elif args.city.lower() in city[3].lower():
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MATCHES.append(city)
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def csvloop(file):
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"""Loop over the lines of the CSV file. We have one list per line."""
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entries = csv.reader(file)
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for entry in entries:
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csvprocessing(entry)
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def print_results(exactitude, result_list):
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"""Stupid function to print results based on very basic formating
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condition."""
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for match in result_list:
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if re.match(r"^([A-Z]+)$", match[1]) and len(match[2]) > 0:
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print('{} {} found for {} from country {}'.format(
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exactitude, match[2], match[3], match[1]
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))
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# Global variables needed on the used functions
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global MATCHES
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global EXACT_MATCH
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global MULTIPLE_MATCHES
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MATCHES = []
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EXACT_MATCH = []
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MULTIPLE_MATCHES = []
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# We look for all the CSV files in the current dir
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for dir_file in files:
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if re.match(r".*\.csv", dir_file, re.I):
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# We can’t assume that CSV file is utf-8 encoded
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try:
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with open(dir_file) as csvfile:
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csvloop(csvfile)
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except UnicodeDecodeError:
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with open(dir_file, encoding='latin-1') as csvfile:
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csvloop(csvfile)
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# If the country has been provided
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if len(EXACT_MATCH) > 0:
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print_results('Exact match', EXACT_MATCH)
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# If the country hasn’t been provided but the cit(y|es) exist(s)
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elif len(MULTIPLE_MATCHES) > 0:
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print_results('Multiple matches', MULTIPLE_MATCHES)
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# Otherwise, throw some garbage to the user
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else:
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if len(args.country) > 0:
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print('Country code has been provided, but no match has been found.',
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file=sys.stderr)
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print('Falling back to worldwide lookup.', file=sys.stderr)
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print_results('Non-exact matches', MATCHES)
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