Source code for pygeoapi.formatter.csv_
# =================================================================
#
# Authors: Tom Kralidis <tomkralidis@gmail.com>
#
# Copyright (c) 2018 Tom Kralidis
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# =================================================================
import io
import logging
import unicodecsv as csv
from pygeoapi.formatter.base import BaseFormatter
LOGGER = logging.getLogger(__name__)
[docs]class CSVFormatter(BaseFormatter):
"""CSV formatter"""
[docs] def __init__(self, formatter_def):
"""
Initialize object
:param formatter_def: formatter definition
:returns: `pygeoapi.formatter.csv_.CSVFormatter`
"""
geom = False
if 'geom' in formatter_def:
geom = formatter_def['geom']
BaseFormatter.__init__(self, {'name': 'csv', 'geom': geom})
self.mimetype = 'text/csv'
[docs] def write(self, options={}, data=None):
"""
Generate data in CSV format
:param options: CSV formatting options
:param data: dict of GeoJSON data
:returns: string representation of format
"""
is_point = False
try:
fields = list(data['features'][0]['properties'].keys())
except IndexError:
LOGGER.error('no features')
return str()
if self.geom:
LOGGER.debug('Including point geometry')
if data['features'][0]['geometry']['type'] == 'Point':
fields.insert(0, 'x')
fields.insert(1, 'y')
is_point = True
else:
# TODO: implement wkt geometry serialization
LOGGER.debug('not a point geometry, skipping')
LOGGER.debug('CSV fields: {}'.format(fields))
output = io.BytesIO()
writer = csv.DictWriter(output, fields)
writer.writeheader()
for feature in data['features']:
fp = feature['properties']
if is_point:
fp['x'] = feature['geometry']['coordinates'][0]
fp['y'] = feature['geometry']['coordinates'][1]
LOGGER.debug(fp)
writer.writerow(fp)
return output.getvalue()