refactor: use namedtuple for essential structure

- intead of extra class

tagmaps/classes/load_data.py

@@ -290,11 +290,18 @@ def get_cleaned_location(self, first_post, locid_userid,
         - some information (e.g. hashtags) need merge with removing dupliates:
         use prepared dictionaries
         - some important information is type-checked (longitude, latitude)
+
+        Keyword arguments:
+        first_post      -- first post of a user_guid at a location
+        locid_userid    -- user_guid and loc_id in merged format
+                           (f'{location}::{user_key}')
+        post_latlng     -- tuple with lat/lng coordinates
+        user_key        -- user_guid
         """
-        cleaned_post = CleanedPost()
+        cleaned_post = CleanedPost()  # named tuple structure
         cleaned_post.origin_id = first_post.origin_id
-        cleaned_post.latitude = float(post_latlng[0])
-        cleaned_post.longitude = float(post_latlng[1])
+        cleaned_post.lat = float(post_latlng[0])
+        cleaned_post.long = float(post_latlng[1])
         cleaned_post.guid = first_post.guid
         cleaned_post.user_guid = user_key
         cleaned_post.post_body = \

tagmaps/classes/shared_structure.py

@@ -4,11 +4,15 @@
 Module for shared structural elements
 """
 
+from collections import namedtuple
+
 
 class PostStructure():
     """Shared structure for Post Attributes
 
     Contains attributes shared among PG DB and LBSN ProtoBuf spec.
+    - this could also be replaces by protobuf lbsnPost() from
+    lbsnstructure package
     """
 
     def __init__(self):
@@ -45,7 +49,18 @@ def __init__(self):
         self.loc_id = None
 
 
-class CleanedPost():
+"""This auto-class provides a structure for fast handling
+of essential post attributes for use in tag maps clustering
+"""
+CleanedPost = namedtuple(
+    'cleanedPostLocation_tuple',
+    'origin_id lat lng guid user_guid '
+    'post_create_date post_publish_date '
+    'post_body hashtags emoji '
+    'post_views_count loc_id')
+
+
+class CleanedPost_():
     """Shared structure for Post Attributes
 
     Contains only the attributes needed for tag maps.