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To make it even clearer that this is wrong, consider this:

>>> shape.contains(shapely.geometry.Point(shapefile_record['properties']['Latitude'],shapefile_record['properties']['Longitude'])) False 

This means that latitude and longitude that define a polygon in its shapefile are not in the polygon?

import fiona import shapely.geometry fc = fiona.open("shapefile.shp") shapefile_record = fiona_collection.next() shape = shapely.geometry.asShape(shapefile_record['geometry']) def is_constituency(lat,lng): point = shapely.geometry.Point(lat,lng) print shape.contains(point) 

import fiona import shapely.geometry fc = fiona.open("shapefile.shp") shapefile_record = fc.next() shape = shapely.geometry.asShape(shapefile_record['geometry']) def is_constituency(lat,lng): point = shapely.geometry.Point(lat,lng) print shape.contains(point)