[addresses] adding new config for postal codes around the world. Allows appending the ISO alpha-2 country code to the beginning of the postcode as in e.g. SI-1000 (only used if the postcode begins with a digit). This system was used for postal codes in continental Europe as a recommendation from the CEPT. Now 7 member states still use it, so in those countries add the country-code with higher probability. The config also contains the license plate codes for countries where e.g. L-1234 might be used instead of LU-1234. Allows configuring in which countries postcodes should be validated using Google's per-country validation regexes (and the ability to override with a custom regex), and in which countries other admin component names should be stripped.

scripts/geodata/postal_codes/config.py

@@ -0,0 +1,51 @@
+import copy
+import operator
+import os
+import random
+import six
+import yaml
+
+from collections import defaultdict
+
+from geodata.address_expansions.address_dictionaries import address_phrase_dictionaries
+from geodata.address_formatting.formatter import AddressFormatter
+from geodata.configs.utils import nested_get, recursive_merge
+
+
+this_dir = os.path.realpath(os.path.dirname(__file__))
+
+POSTAL_CODES_CONFIG_FILE = os.path.join(this_dir, os.pardir, os.pardir, os.pardir,
+                                        'resources', 'postal_codes', 'config.yaml')
+
+
+class PostalCodesConfig(object):
+    def __init__(self, config_file=POSTAL_CODES_CONFIG_FILE):
+        self.cache = {}
+        postal_codes_config = yaml.load(open(config_file))
+
+        self.global_config = postal_codes_config['global']
+        self.country_configs = {}
+
+        countries = postal_codes_config.pop('countries', {})
+
+        for k, v in six.iteritems(countries):
+            country_config = countries[k]
+            global_config_copy = copy.deepcopy(self.global_config)
+            self.country_configs[k] = recursive_merge(global_config_copy, country_config)
+
+        self.country_configs[None] = self.global_config
+
+    def get_property(self, key, country=None, default=None):
+        if isinstance(key, six.string_types):
+            key = key.split(u'.')
+
+        config = self.global_config
+
+        if country:
+            country_config = self.country_configs.get(country.lower(), {})
+            if country_config:
+                config = country_config
+
+        return nested_get(config, key, default=default)
+
+postal_codes_config = PostalCodesConfig()