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parking

master
Victor Fors 1 year ago
parent
commit
dcd7e5eab4
1 changed files with 62 additions and 0 deletions
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      parking

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parking View File

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#!/usr/bin/python3
import requests
import sys
import textwrap
import pprint
from pathlib import Path
try:
from simplejson.errors import JSONDecodeError
except ImportError:
from json.decoder import JSONDecodeError

api = 'http://parkering.linkoping.se/'
key = Path('key-parking').read_text().strip()

# Fetch JSON from url and run it through transform, pretty printing errors
# and the data worked on as exhaustively as possible.
def json_query(url, transform, params={}):
try:
result = requests.get(url, params)
except requests.exceptions.ConnectionError:
print("Network connection error.")
sys.exit(1)
try:
data = result.json()
except JSONDecodeError as err:
print('Error when decoding JSON:\nFrom endpoint ' + url + ':\n' + str(err) + '\n' + str(result) + '\n')
sys.exit(1)
try:
return transform(data)
except (IndexError, KeyError) as err:
print('Error when traversing JSON:\nFrom endpoint ' + url + ':\n' + str(err))
pprint.PrettyPrinter(indent=2).pprint(data)
sys.exit(1)

# Get parking lots from the municipal server.
# The timestamp part of this API does not work as expected, if non-zero it will return all computer parking terminal lots
# in ParkingAreaUpdateList regardless of their status, up to a timestamp of less than one hour into the future, after which it will return nothing.
def get_parking_lots():
return json_query(api + 'Parkeringsdata/ParkeringsdataV1.svc/GetParkeringsytaList/' + key + '/0', lambda data: data['ParkingAreaNewList'], {})

# The key ParkingSpacesAvailable is only present for those lots that are tracked by computer parking terminals.
# All other lots only have static information available.
def computerized(lot):
return 'ParkingSpacesAvailable' in lot

# The parking type '4' means handicap spots, whoever organized this put handicap spots as separate lots with duplicate names.
def only_has_handicap_spots(lot):
return lot['ParkingTypes'] == [4]

# The downtown parking lots are equipped with electric charging stations and the API has a parking type for this
# but the lot data has not been updated to reflect this, so this function always returns False.
def electric_car_lot(lot):
return 3 in lot['ParkingTypes']

def main():
print('Parking spaces available:')
for lot in sorted(get_parking_lots(), key=lambda lot: lot['Name']):
if computerized(lot) and not only_has_handicap_spots(lot):
print("{Name}: {ParkingSpacesAvailable}/{ParkingSpaces}".format(**lot))

if __name__ == '__main__':
main()

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