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Database of zipcodes, cantons and municipalities for Switzerland

Project description

Swiss zipcodes database

This library provides an easy way to look up a swiss zipcode and get its canton or municipality. Use it like this:

>>> from zipch import ZipcodesDatabase
>>> zd = ZipcodesDatabase('/tmp/zipcodes')
>>> zd.get_location(1003)
Location(official_name='Lausanne', canton='VD', municipality='Lausanne', coordinates=Lv95Coordinates(E=Decimal('2537956.3654948957'), N=Decimal('1152398.7080000006')))

Installation

Zipch has been tested on Python 3.7+. The easiest way to install it is by using PyPI:

pip install zipch

Usage

Start by creating a ZipcodesDatabase object. In the example below, /tmp/zipcodes is a file that will be used as the zipcodes database. If the file doesn't exist yet, it will be created by downloading the latest version of the zipcodes database.

>>> from zipch import ZipcodesDatabase
>>> zd = ZipcodesDatabase('/tmp/zipcodes')

You can then get all the zipcodes registered in the database as a {zipcode: location} dict:

>>> zd.get_locations()
{8192: Location(official_name='Zweidlen', canton='ZH', municipality='Glattfelden'), 8193: Location(official_name='Eglisa', canton='ZH', municipality='Eglisa'), ...}

The library packs with some utility functions, these are all things that can be derived from get_locations() but that are here for convenience:

>>> zd.get_location(1003)
Location(official_name='Lausanne', canton='VD', municipality='Lausanne', coordinates=Lv95Coordinates(E=Decimal('2537956.3654948957'), N=Decimal('1152398.7080000006')))
>>> zd.get_zipcodes_for_municipality('Lausanne')
[1000, 1003, 1004, 1005, 1007, 1010, 1011, 1018, 1012]
>>> zd.get_zipcodes_for_canton('VD')
[1412, 1428, 1430, 1441, 1450, 1114, 1000, 1003, ...]
>>> zd.get_cantons()
['AG', 'AI', 'AR', 'BE', 'BL', 'BS', ...]
>>> zd.get_municipalities()
['Aadorf', 'Aara', 'Aarberg', 'Aarburg', 'Aarwangen', ...]

Geolocation

Location objects also have a coordinates attribute, which contains the coordinates in LV95 format. You can use the lv95_to_wgs84 function to convert these coordinates to regular WGS84 longitude & latitude coordinates:

>>> from zipch import ZipcodesDatabase, lv95_to_wgs84
>>> lv95_to_wgs84(ZipcodesDatabase("/tmp/zipcodes").get_location(1003).coordinates)

Coordinates in regular WGS84 format are available in the wgs84_coordinates attribute.

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