Wrapper for the Swiss Parliament API for Python

Overview

PyPI Version Build Status

swissparlpy

This module provides easy access to the data of the OData webservice of the Swiss parliament.

Table of Contents

Installation

swissparlpy is available on PyPI, so to install it simply use:

$ pip install swissparlpy

Usage

See the examples directory for more scripts.

Get tables and their variables

>>> import swissparlpy as spp
>>> spp.get_tables()[:5] # get first 5 tables
['MemberParty', 'Party', 'Person', 'PersonAddress', 'PersonCommunication']
>>> spp.get_variables('Party') # get variables of table `Party`
['ID', 'Language', 'PartyNumber', 'PartyName', 'StartDate', 'EndDate', 'Modified', 'PartyAbbreviation']

Get data of a table

>>> import swissparlpy as spp
>>> data = spp.get_data('Canton', Language='DE')
>>> data
<swissparlpy.client.SwissParlResponse object at 0x7f8e38baa610>
>>> data.count
26
>>> data[0]
{'ID': 2, 'Language': 'DE', 'CantonNumber': 2, 'CantonName': 'Bern', 'CantonAbbreviation': 'BE'}
>>> [d['CantonName'] for d in data]
['Bern', 'Neuenburg', 'Genf', 'Wallis', 'Uri', 'Schaffhausen', 'Jura', 'Basel-Stadt', 'St. Gallen', 'Obwalden', 'Appenzell A.-Rh.', 'Solothurn', 'Waadt', 'Zug', 'Aargau', 'Basel-Landschaft', 'Luzern', 'Thurgau', 'Freiburg', 'Appenzell I.-Rh.', 'Schwyz', 'Graubünden', 'Glarus', 'Tessin', 'Zürich', 'Nidwalden']

The return value of get_data is iterable, so you can easily loop over it. Or you can use indices to access elements, e.g. data[1] to get the second element, or data[-1] to get the last one.

Even slicing is supported, so you can do things like only iterate over the first 5 elements using

for rec in data[:5]:
   print(rec)

Use together with pandas

To create a pandas DataFrame from get_data simply pass the return value to the constructor:

>>> import swissparlpy as spp
>>> import pandas as pd
>>> parties = spp.get_data('Party', Language='DE')
>>> parties_df = pd.DataFrame(parties)
>>> parties_df
      ID Language  PartyNumber  ...                   EndDate                         Modified PartyAbbreviation
0     12       DE           12  ... 2000-01-01 00:00:00+00:00 2010-12-26 13:05:26.430000+00:00                SP
1     13       DE           13  ... 2000-01-01 00:00:00+00:00 2010-12-26 13:05:26.430000+00:00               SVP
2     14       DE           14  ... 2000-01-01 00:00:00+00:00 2010-12-26 13:05:26.430000+00:00               CVP
3     15       DE           15  ... 2000-01-01 00:00:00+00:00 2010-12-26 13:05:26.430000+00:00      FDP-Liberale
4     16       DE           16  ... 2000-01-01 00:00:00+00:00 2010-12-26 13:05:26.430000+00:00               LDP
..   ...      ...          ...  ...                       ...                              ...               ...
78  1582       DE         1582  ... 2000-01-01 00:00:00+00:00 2015-12-03 08:48:38.250000+00:00             BastA
79  1583       DE         1583  ... 2000-01-01 00:00:00+00:00 2019-03-07 17:24:15.013000+00:00              CVPO
80  1584       DE         1584  ... 2000-01-01 00:00:00+00:00 2019-11-08 17:28:43.947000+00:00                Al
81  1585       DE         1585  ... 2000-01-01 00:00:00+00:00 2019-11-08 17:41:39.513000+00:00               EàG
82  1586       DE         1586  ... 2000-01-01 00:00:00+00:00 2021-08-12 07:59:22.627000+00:00               M-E

[83 rows x 8 columns]

Substrings

If you want to query for substrings there are two main operators to use:

__startswith:

>>> import swissparlpy as spp
>>> persons = spp.get_data("Person", Language="DE", LastName__startswith='Bal')
>>> persons.count
12

__contains

>>> import swissparlpy as spp
>>> co2_business = spp.get_data("Business", Title__contains="CO2", Language = "DE")
>>> co2_business.count
265

You can suffix any field with those operators to query the data.

Large queries

Large queries (especially the tables Voting and Transcripts) may result in server-side errors (500 Internal Server Error). In these cases it is recommended to download the data in smaller batches, save the individual blocks and combine them after the download.

This is an example script to download all votes of the legislative period 50, session by session, and combine them afterwards in one DataFrame:

import swissparlpy as spp
import pandas as pd
import os

__location__ = os.path.realpath(os.getcwd())
path = os.path.join(__location__, "voting50")

# download votes of one session and save as pickled DataFrame
def save_votes_of_session(id, path):
    if not os.path.exists(path):
        os.mkdir(path)
    data = spp.get_data("Voting", Language="DE", IdSession=id)
    print(f"{data.count} rows loaded.")
    df = pd.DataFrame(data)
    pickle_path = os.path.join(path, f'{id}.pks')
    df.to_pickle(pickle_path)
    print(f"Saved pickle at {pickle_path}")


# get all session of the 50 legislative period
sessions50 = spp.get_data("Session", Language="DE", LegislativePeriodNumber=50)
sessions50.count

for session in sessions50:
    print(f"Loading session {session['ID']}")
    save_votes_of_session(session['ID'], path)

# Combine to one dataframe
df_voting50 = pd.concat([pd.read_pickle(os.path.join(path, x)) for x in os.listdir(path)])

Credits

This library is inspired by the R package swissparl of David Zumbach. Ralph Straumann initial asked about a Python version of swissparl on Twitter, which led to this project.

Release

To create a new release, follow these steps (please respect Semantic Versioning):

  1. Adapt the version number in swissparlpy/__init__.py
  2. Update the CHANGELOG with the version
  3. Create a pull request to merge develop into main (make sure the tests pass!)
  4. Create a new release/tag on GitHub (on the main branch)
  5. The publication on PyPI happens via GitHub Actions on every tagged commit
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Comments
  • Ein Datum wird bei bestimmten Sessionen nicht richtig geparst

    Ein Datum wird bei bestimmten Sessionen nicht richtig geparst

    Danke vielmals für das tolle Swissparlpy-Modul! Ich habe versucht, Dein Beispiel für Votes auf den Download von Reden (Table ’Transcript’) anzuwenden, bekomme aber ein Fehler beim Parsen eines Datums. Die Session 5002 (spp.get_data("Transcript", IdSession=5002)) geht interessanterweise, aber die Sessionen 5001 und 5003 nicht (z.B. spp.get_data("Transcript", IdSession=5001)), da bekomme ich jeweils den Fehler, dass strptime ein Datum nicht Parsen kann. Hier mein Code:

    import swissparlpy as spp
    import pandas as pd
    import os
    
    __location__ = os.path.realpath(os.getcwd())
    path2 = os.path.join(__location__, "transcripts50")
    
    # download transcripts of one session and save as pickled DataFrame
    def save_transcripts_of_session(id, path2):
        if not os.path.exists(path2):
            os.mkdir(path2)
        data = spp.get_data("Transcript", IdSession=id)
        print(f"{data.count} rows loaded.")
        df = pd.DataFrame(data)
        pickle_path = os.path.join(path2, f'{id}.pks')
        df.to_pickle(pickle_path)
        print(f"Saved pickle at {pickle_path}")
    
    save_transcripts_of_session(5001, path2)
    
    

    Hier die Fehlermeldung: Fehler_Transcripts.txt Mein Problem ist, dass nicht ersichtlich wird, welche Variable der Fehler betrifft und ob die Einträge mit diesem Datum schlicht ignoriert werden können?

    opened by bwueest 5
  • Added documentation for swissparAPY tables

    Added documentation for swissparAPY tables

    Provided some documentation using dbdiagram.io to have an explanation of the roles of the fields and tables as well as their relationships.

    Added

    docs folder containing the code and visualization for the documentation.

    Updated

    README.md to include the visualization as well as a link to the code.

    opened by peterbonnesoeur 2
  • Discrepancy between count and returned entities

    Discrepancy between count and returned entities

    Hello,

    Thank you for your work on the library !

    I think there might be an issue either from the parlement api or from the library. Basically the returned count is different from the number of entities. Here are the steps to reproduce:

    import swissparlpy as spp
    person = spp.get_data("Person")
    print(person.count)
    print(len(person.entities))
    

    Result:

    18170
    1000
    

    Any Idea why this is the case?

    Thanks!

    opened by Ahmedjjj 1
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