ros2: ros2 pkg create for python package problem

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Hi

I created ROS2 packages using

ros2 pkg create package_name

Whenever, I do that, it creates a C++ package with CMakeList.txt.

I tried to use the option --build-type, but it only suggests cmake and ament_cmake as build type. There is no option for ament_python.

I want to create a python package, but could not see any means to do that. Should I write setup.py and package.xml manually or there is a command to do it?

Also, I understood that Python code should be in a Python package, and C++ code should be a C++ package and could be merged, where as in ROS1, Python and C++ can at the same package. Is my understanding correct?

PS. I am using latest bouncy version in Ubuntu Bionic.

Thanks Anis