diff --git a/atdb/communication.py b/atdb/communication.py
index b466c2027a112fa859ec8e33de51f53b34c04bc4..68f8d8b02978622f40d2874a7e427b9f87b2a081 100644
--- a/atdb/communication.py
+++ b/atdb/communication.py
@@ -127,8 +127,9 @@ class APIConnector:
         """
         Change the whole task content
         """
-        return self._request_path("PUT", f"tasks/{task_id}",
-                                  content={"size_processed": processed_size})
+        return self._request_path(
+            "PUT", f"tasks/{task_id}", content={"size_processed": processed_size}
+        )
 
     def change_task_status(self, task_id, status) -> None:
         """
diff --git a/atdb/fix.py b/atdb/fix.py
index 196a00d7b38534e54ad1442a9a762f6d3957a617..efff84aa5293d36fbe0ab22df950e892b2e6416f 100644
--- a/atdb/fix.py
+++ b/atdb/fix.py
@@ -1,44 +1,71 @@
-import atdb.communication as com
+"""
+Fix command module
+"""
 import logging
+import atdb.communication as com
+
+
+logger = logging.getLogger("fix")
+
 
-logger = logging.getLogger('fix')
 def aggregate_on_tree(tree, field):
+    """
+    Aggregated values with a given field name from a dict tree
+    """
     if isinstance(tree, dict) and field in tree:
         return tree[field]
-    elif isinstance(tree, dict):
+    if isinstance(tree, dict):
         total = 0
         for value in tree.values():
             total += aggregate_on_tree(value, field)
         return total
-    elif isinstance(tree, list):
+    if isinstance(tree, list):
         total = 0
         for item in tree:
             total += aggregate_on_tree(item, field)
         return total
-    else:
-        return 0
+
+    return 0
+
 
 def compute_output_sizes(outputs):
+    """
+    Computes the size of the output files
+    """
     if outputs is not None:
-        return aggregate_on_tree({key: value for key, value in outputs.items() if key != 'ingest'}, 'size')
-    else:
-        return 0
+        return aggregate_on_tree(
+            {key: value for key, value in outputs.items() if key != "ingest"}, "size"
+        )
+    return 0
+
 
 def fix_computed_sizes(connector, dry_run=True):
-    for task in connector.list_iter('tasks'):
-        task_id = task['id']
-        size_before = task['size_processed']
-        total_output_size = compute_output_sizes(task['outputs'])
-        task['size_processed'] = total_output_size
+    """
+    Fix the size of the computed task
+    """
+    for task in connector.list_iter("tasks"):
+        task_id = task["id"]
+        size_before = task["size_processed"]
+        total_output_size = compute_output_sizes(task["outputs"])
+        task["size_processed"] = total_output_size
         if not dry_run:
             if size_before != total_output_size:
                 connector.update_task_processed_size(task_id, total_output_size)
         else:
             if size_before != total_output_size:
-                logger.info('Dry run: Size updated for %s from %s to %s', task_id,
-                         size_before, total_output_size)
+                logger.info(
+                    "Dry run: Size updated for %s from %s to %s",
+                    task_id,
+                    size_before,
+                    total_output_size,
+                )
 
 
 def fix(args):
+    """
+    Fix command
+
+    Changes task fields to be consistent with each others
+    """
     connector = com.APIConnector.from_args(args)
-    fix_computed_sizes(connector, dry_run=args.dry_run)
\ No newline at end of file
+    fix_computed_sizes(connector, dry_run=args.dry_run)