Question

I encountered a snippet of code like:

  from object_recognition_msgs.msg import *

In my opinion, this but I found there’s no msg.py in object_recognition_msgs(which is a directory),
however, there’s a directory named “msg” in object_recognition_msgs, the structure of the directory is

  object_recognition_msgs
  ├── msg
      ├── __init__.py
      ├── _ObjectId.py
      ├── _ObjectInformation.py
      ├── _ObjectRecognitionActionFeedback.py
      ├── _ObjectRecognitionActionGoal.py
      ├── _ObjectRecognitionAction.py
      ├── _ObjectRecognitionActionResult.py
      ├── _ObjectRecognitionFeedback.py
      ├── _ObjectRecognitionGoal.py
      ├── _ObjectRecognitionResult.py
      ├── _RecognizedObjectArray.py
      ├── _RecognizedObject.py
      ├── _TableArray.py
      └── _Table.py

I interpreted “from object_recognition_msgs.msg import *” as importing all python files in object_recognition_msgs/msg, is this interpretation correct?

Thanks in advance.

Answer 1

That statement would import all names from the __init__.py module in the package, not the files contained.

You’d have to import each module in the package in the __init__.py file explicitly for the * to import everything in all the modules in the package.