What is the difference between ros2_node and ros2_python_node execTypes?

[RRG2003]

This comes up a lot so posting it here.

ros2_node:
Runs your code as a standalone Python file using python3 solution.py.
Best for: nodes that don't need colcon build, simple publisher/subscriber/service problems.

ros2_python_node:
Builds your code as a proper ROS2 Python package using colcon, then runs it with ros2 run.
Best for: problems that need multiple files (package.xml, setup.py), or where the entry point must match ros2 run pkg_name node_name format.

If your problem has a files[] array with package.xml and setup.py, it uses ros2_python_node. Otherwise it uses ros2_node.

Hope that helps. Post below if you have more questions about execution types.