Close the connection when done

spotipy/client.py

@@ -102,6 +102,8 @@ class Spotify(object):
         except:
             raise SpotifyException(r.status_code,
                 -1, '%s:\n %s' % (r.url, r.json()['error']['message']))
+        finally:
+            r.connection.close()
         if len(r.text) > 0:
             results = r.json()
             if self.trace:  # pragma: no cover