more use(less,ful) comments

src/classes.py

@@ -83,10 +83,10 @@ class Entrypoint:
     def __init__(self, sample_data):
         try:
             self.extra = sample_data["metadata_decoded"]["extra_fields"]
-            self.linked_items = sample_data["items_links"]
-            self.batch_elabid = self.extra["Substrate batch"]["value"]
-            self.linked_experiments = sample_data["related_experiments_links"]
-            self.linked_experiments_elabid = [ i["entityid"] for i in self.linked_experiments ]
+            self.linked_items = sample_data["items_links"] # dict
+            self.batch_elabid = self.extra["Substrate batch"]["value"] # elabid
+            self.linked_experiments = sample_data["related_experiments_links"] # dict
+            self.linked_experiments_elabid = [ i["entityid"] for i in self.linked_experiments ] # list of elabid
         except KeyError as k:
             # Some keys are not required and can be called through the .get() method - which is permissive and allows null values;
             # Other keys are required so if they can't be called (invalid or null) raise error and stop execution of the program: