dvb 1.0

query Dresden's public transport system for current bus- and tramstop data in python

An unofficial python module giving you a few options to query a collection of publicly accessible API methods for Dresden’s public transport system.

In case you’re looking for something like this for node.js, check out dvbjs.

dvbpy is not available on PyPI for the time being. Please download it yourself and import it to get started.

import dvb

Requirements

dvbpy needs requests for HTTP-Communication and pyproj for geocoordinate transformations * pip install requests * pip install pyproj

Monitor a single stop

Monitor a single stop to see every bus or tram leaving this stop after the specified time offset.

import dvb

stop = 'Helmholtzstraße'
time_offset = 0 # how many minutes in the future, 0 for now
num_results = 2
city = 'Dresden'

dvb.monitor(stop, time_offset, num_results, city)

[{
    'line': '85',
    'direction': 'Striesen',
    'arrival': 5
},
{
    'line': '85',
    'direction': 'Löbtau Süd',
    'arrival': 7
}]

You can also call monitor() without city, num_results or time_offset. City will default to Dresden.

Find routes

Query the server for possible routes from one stop to another. Returns multiple possible trips, the bus-/tramlines to be taken, the single stops, their arrival and departure times and their GPS coordinates.

import dvb
import time

origin = 'Zellescher Weg'
city_origin = 'Dresden'
destination = 'Postplatz'
city_destination = 'Dresden'
time = int(time.time()) # a unix timestamp is wanted here
deparr = 'dep'  # set to 'arr' for arrival time, 'dep' for departure time

dvb.route(origin, destination, city_origin, city_destination, time, deparr)

{
    'trips': [{
        'interchange': 0,
        'nodes': [{
            'line': '11',
            'mode': 'Straßenbahn',
            'direction': 'Dresden Bühlau Ullersdorfer Platz',
            'path': [
                [13.745754, 51.02816],
                [13.745848, 51.028393],
                ...
            ],
            'departure': {
                'time': '18:01',
                'stop': 'Zellescher Weg',
                'coords': '13745754,51028160'
            },
            'arrival': {
                'time': '18:14',
                'stop': 'Postplatz',
                'coords': '13733717,51050544'
            }
        }],
        'duration': '00:13',
        'departure': '18:01',
        'arrival': '18:14'
    },
    ...
    }],
    'origin': 'Dresden, Zellescher Weg',
    'destination': 'Dresden, Postplatz'
}

Everything besides origin and destination is optional and only needs to be included if necessary. City for origin and destination defaults to Dresden, time to now and is handled as the departure time.

The path property contains a list consisting of all the coordinates describing the path of this node. Useful for example if you want to draw it on a map.

Find stops by name

Search for a single stop in the network of the DVB.

import dvb

dvb.find('zellesch')

[{
    'name': 'Zellescher Weg',
    'city': 'Dresden',
    'coords': [51.028366, 13.745847]
}]

The fields city and coords are optional as they are not available for every stop. So don’t forget to check for their existence first.

[stop for stop in dvb.find('Post') if 'city' in stop if stop['city'] == 'Dresden']

Find other POIs with coordinates

Search for all kinds of POIs inside a given square.

import dvb

southwest_lat = 51.04120
southwest_lng = 13.70106
northeast_lat = 51.04615
northeast_lng = 13.71368

pintypes = 'stop'
# can be poi, platform, rentabike, ticketmachine, parkandride, carsharing or stop

dvb.pins(southwest_lat, southwest_lng, northeast_lat, northeast_lng, pintypes)

pintypes defaults to ‘stop’ if no other input is given.

[
   {
      "connections":"1:7~8~9~10~11~12",
      "coords":{
         "lat":51.04373256804444,
         "lng":13.70625638110702
      },
      "id":33000143,
      "name":"Saxoniastraße"
   },
   {
      "connections":"2:61~90",
      "coords":{
         "lat":51.04159705545878,
         "lng":13.7053650905211
      },
      "id":33000700,
      "name":"Ebertplatz"
   },
   {
      "connections":"1:6~7~8~9~10~11~12#2:61~63~90~A#3:333",
      "coords":{
         "lat":51.04372841952444,
         "lng":13.703461228676069
      },
      "id":33000144,
      "name":"Tharandter Straße"
   }, ...
]

Look up coordinates for POI

Find the coordinates for a given POI id.

import dvb

dvb.poi_coords(33000755)

{'lat': 51.018745307424005, 'lng': 13.758700156062707}

Address for coordinates - WIP

Look up the address for a given set of coordinates.

import dvb

lat = 51.04373
lng = 13.70320

dvb.address(lat, lng)

{
    'city': u'Dresden',
    'address': u'Kesselsdorfer Straße 1'
}

Other stuff

Stop names in queries are very forgiving. As long as the server sees it as a unique hit, it’ll work. ‘Helmholtzstraße’ finds the same data as ‘helmholtzstrasse’, ‘Nürnberger Platz’ = ‘nuernbergerplatz’ etc.

One last note, be sure not to run whatever it is you’re building from inside the network of the TU Dresden. Calls to dvb.route() and dvb.find() will time out. This is unfortunately expected behavior as API calls from these IP ranges are blocked.