diff --git a/python/pyproject.toml b/python/pyproject.toml
index 79ddc40..e28e485 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "robologs-ros-utils"
-version = "0.1.1a44"
+version = "0.1.1a45"
 description = "robologs-ros-utils is an open source library of containerized data transformations for the robotics and drone communities"
 authors = ["roboto.ai <info@roboto.ai>"]
 license = "Apache-2.0"
diff --git a/python/robologs_ros_utils/cli.py b/python/robologs_ros_utils/cli.py
index 88b1619..ee94251 100644
--- a/python/robologs_ros_utils/cli.py
+++ b/python/robologs_ros_utils/cli.py
@@ -1,10 +1,13 @@
 import click
 
-from robologs_ros_utils.sources.ros1 import (clip_rosbag,
-                                             get_csv_data_from_bag,
-                                             get_images_from_bag,
-                                             get_summary_from_bag,
-                                             get_videos_from_bag, split_rosbag)
+from robologs_ros_utils.sources.ros1 import (
+    clip_rosbag,
+    get_csv_data_from_bag,
+    get_images_from_bag,
+    get_summary_from_bag,
+    get_videos_from_bag,
+    split_rosbag,
+)
 
 
 @click.group(invoke_without_command=True)
diff --git a/python/robologs_ros_utils/sources/ros1/commands.py b/python/robologs_ros_utils/sources/ros1/commands.py
index 628342e..88bd923 100644
--- a/python/robologs_ros_utils/sources/ros1/commands.py
+++ b/python/robologs_ros_utils/sources/ros1/commands.py
@@ -1,7 +1,6 @@
 import click
 
-from . import (clip_rosbag, get_images_from_bag, get_summary_from_bag,
-               get_videos_from_bag, split_rosbag)
+from . import clip_rosbag, get_images_from_bag, get_summary_from_bag, get_videos_from_bag, split_rosbag
 
 
 @click.group()
diff --git a/python/robologs_ros_utils/sources/ros1/get_summary_from_bag.py b/python/robologs_ros_utils/sources/ros1/get_summary_from_bag.py
index d017521..3ca4e72 100644
--- a/python/robologs_ros_utils/sources/ros1/get_summary_from_bag.py
+++ b/python/robologs_ros_utils/sources/ros1/get_summary_from_bag.py
@@ -26,7 +26,7 @@ def get_summary(input, output, file_name, split, hidden):
     if split:
         for bag_path, bag_info in rosbag_info_dict.items():
             bag_dir = os.path.dirname(bag_path)
-            bag_name = os.path.basename(bag_path).replace(".bag", ".json")
+            bag_name = os.path.basename(bag_path) + ".json"
             if hidden:
                 bag_name = "." + bag_name
 
diff --git a/python/robologs_ros_utils/sources/ros1/ros_utils.py b/python/robologs_ros_utils/sources/ros1/ros_utils.py
index 7da831f..94f5ffd 100644
--- a/python/robologs_ros_utils/sources/ros1/ros_utils.py
+++ b/python/robologs_ros_utils/sources/ros1/ros_utils.py
@@ -52,7 +52,7 @@ def get_bag_info_from_file(rosbag_path: str) -> dict:
     summary_dict["start_time"] = bag.start_time
     summary_dict["end_time"] = bag.end_time
     summary_dict["duration"] = bag.end_time - bag.start_time
-    summary_dict["file_size_mb"] = file_stats.st_size / (1024 * 1024)
+    summary_dict["file_size_mb"] = str(file_stats.st_size / (1024 * 1024))
     summary_dict["topics"] = bag.topic_table.to_dict("records")
 
     return summary_dict
@@ -118,7 +118,7 @@ def create_manifest_entry_dict(msg_timestamp: int, rosbag_timestamp: int, file_p
     }
 
 
-def get_image_topic_types():
+def get_image_topic_types() -> list:
     """
     Returns:
 
@@ -177,7 +177,7 @@ def replace_ros_topic_name(topic_name: str, replace_character: str = "_") -> str
     return topic_name.replace("/", replace_character)[1:]
 
 
-def get_filter_fraction(start_time: Optional[float], end_time: Optional[float], start_rosbag: float, end_rosbag: float):
+def get_filter_fraction(start_time: Optional[float], end_time: Optional[float], start_rosbag: float, end_rosbag: float) -> Optional[float]:
     """
     Args:
         start_time (float or None):
@@ -191,7 +191,7 @@ def get_filter_fraction(start_time: Optional[float], end_time: Optional[float],
     rosbag_duration = end_rosbag - start_rosbag
 
     if rosbag_duration <= 0:
-        return
+        return None
 
     if start_time and end_time:
         return float((end_time - start_time) / rosbag_duration)
@@ -205,6 +205,8 @@ def get_filter_fraction(start_time: Optional[float], end_time: Optional[float],
     if not end_time and not start_time:
         return 1
 
+    return None
+
 
 def check_if_in_time_range(t: float, start_time: float, end_time: float) -> bool:
     """
@@ -238,8 +240,10 @@ def check_if_in_time_range(t: float, start_time: float, end_time: float) -> bool
     if not start_time and not end_time:
         return True
 
+    return False
 
-def get_name_img_manifest():
+
+def get_name_img_manifest() -> str:
     """
     Returns:
 
@@ -277,7 +281,7 @@ def get_images_from_bag(
     sample: Optional[int] = None,
     start_time: Optional[float] = None,
     end_time: Optional[float] = None,
-):
+) -> list:
     """
     Args:
         rosbag_path (str):