prepare_datasets.py

#!/usr/bin/env python
# vim: set fileencoding=utf-8 :

# Copyright (c) 2015 Code for Karlsruhe (http://codefor.de/karlsruhe)
#
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# furnished to do so, subject to the following conditions:
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"""
Script to prepare individual datasets from complete data.

Takes ``streetnames.geojson`` and outputs various JSON files.
"""

from __future__ import unicode_literals

import codecs
import json
import os.path
import re

import geojson


if __name__ == '__main__':
    HERE = os.path.dirname(os.path.abspath(__file__))
    SOURCE = os.path.join(HERE, 'streetnames.geojson')

    with codecs.open(SOURCE, 'r', encoding='utf8') as f:
        data = geojson.load(f)
    features = {}
    for feature in data['features']:
        features[feature.id] = feature

    def save(data, basename):
        filename = os.path.join(HERE, basename)
        with codecs.open(filename, 'w', encoding='utf8') as f:
            geojson.dump(data, f)

    def select(fun):
        return [f for f in features.itervalues() if fun(f['properties'])]

    #
    # Gender
    #
    dataset = [
        {
            'features': select(lambda p: p.get('gender') == 'm'),
            'label': 'männlich',
            'color': '#ff7f00',
        },
        {
            'features': select(lambda p: p.get('gender') == 'f'),
            'label': 'weiblich',
            'color': '#007fff',
        },
    ]
    save(dataset, 'gender.json')