First draft of geocoding

geocoding.py

@@ -0,0 +1,28 @@
+from geopy.geocoders import Nominatim
+from geopy.distance import vincenty
+
+
+geolocator = Nominatim()
+
+
+def position_of_location(location):
+    """returns a pair (latitude, longitude) from an adress
+    or None if not possible"""
+    try:
+      pos = geolocator.geocode(location)
+      return (pos.latitude, pos.longitude)
+    except:
+      return None
+
+def dist(posa, posb):
+    """compute the distance between two position (pair latitude, longitude)
+    in kilometers
+    or None if one of the argument is None"""
+    if not posa or not posb:
+        return None
+    else:
+        return vincenty(posa, posb).km
+
+p1 = position_of_location("22 rue Henri Barbusse VILLEJUIF")
+p2 = position_of_location("Université paris diderot")
+print(p1, p2, dist(p1, p2))