first pass on overpass api, still getting an error with columns

src/pg/observatory.control

@@ -1,5 +1,5 @@
 comment = 'CartoDB Observatory backend extension'
 default_version = '1.1.6'
-requires = 'postgis, postgres_fdw'
+requires = 'postgis, postgres_fdw, plpythonu'
 superuser = true
 schema = cdb_observatory

src/pg/sql/60_observatory_providers.sql

@@ -0,0 +1,7 @@
+CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetOverpass(query text)
+RETURNS table (lat Numeric, lon Numeric, "type" TEXT, id Numeric, tags TEXT) as $$
+
+    from observatory.osm import get_overpass
+    return get_overpass(query)
+
+$$ LANGUAGE plpythonu;

src/pg/test/sql/01_install_test.sql

@@ -1,6 +1,7 @@
 -- Install dependencies
 CREATE EXTENSION postgis;
 CREATE EXTENSION postgres_fdw;
+CREATE EXTENSION plpythonu;
 
 -- Install the extension
 CREATE EXTENSION observatory VERSION 'dev';

src/python/Makefile

@@ -0,0 +1,4 @@
+# Install the package locally for development
+
+install:
+	pip install --upgrade ./crankshaft

src/python/observatory/observatory/osm.py

@@ -0,0 +1,24 @@
+from overpass import API
+
+import json
+
+def get_overpass(query):
+    '''
+    Return results of a raw overpass query.
+    '''
+
+    '''
+(node
+  [amenity]
+  (around:400,
+40.704301, -73.936658);
+way
+  [amenity]
+  (around:400,
+40.704301, -73.936658))
+    '''
+
+    api = API()
+    response = api.Get(query, responseformat='json')
+
+    return [(el['lat'], el['lon'], el['type'], el['id'], json.dumps(el['tags']), ) for el in response['elements'] if 'lat' in el]

src/python/observatory/requirements.txt

@@ -0,0 +1 @@
+overpass==0.5.6

src/python/observatory/setup.py

@@ -0,0 +1,50 @@
+"""
+CartoDB Spatial Analysis Python Library
+See:
+https://github.com/CartoDB/crankshaft
+"""
+
+from setuptools import setup, find_packages
+
+setup(
+    name='observatory',
+
+    version='0.0.1',
+
+    description='CARTO Observatory Python Library',
+
+    url='https://github.com/CartoDB/observatory-extension',
+
+    author='Research and Data - CARTO',
+    author_email='john@carto.com',
+
+    license='MIT',
+
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'Intended Audience :: Mapping comunity',
+        'Topic :: Maps :: Mapping Tools',
+        'License :: OSI Approved :: MIT License',
+        'Programming Language :: Python :: 2.7',
+    ],
+
+    keywords='maps mapping tools spatial data',
+
+    packages=find_packages(exclude=['contrib', 'docs', 'tests']),
+
+    extras_require={
+        'dev': ['unittest'],
+        'test': ['unittest', 'nose', 'mock'],
+    },
+
+    # The choice of component versions is dictated by what's
+    # provisioned in the production servers.
+    # IMPORTANT NOTE: please don't change this line. Instead issue a ticket to systems for evaluation.
+    install_requires=[],
+    #install_requires=['overpass==0.5.6'],
+
+    requires=[],
+    #requires=['overpass'],
+
+    #test_suite='test'
+)