rclpy import in application fails

edit

Hi,

i trying to import the rclpy libary in an application written in python.

if i use #import rclpy i alway get an error message like this

ImportError: DLL load failed: ...

The C extension 'C:\ros2\install\Lib\site-packages\rclpy_rclpy.pyd' failed to be imported while being present on the system. Please refer to 'https://github.com/ros2/ros2/wiki/Rclpy-Import-error-hint' for possible solutions

But when i run the demo_nodes_py everything seems to work fine

I dont want to build the python package with ament or colcon i just want to use the rclpy API is this possible ?

edit: it works with this parent script

def main():
    # extend the path first  by prepending ros2 path settings
    path = os.environ.get('PATH').split(os.pathsep)
    path = [os.path.join(ROS_INSTALL_DIR, 'Scripts'),  os.path.join(ROS_INSTALL_DIR, 'bin')] + path
    os.environ['PATH'] = os.pathsep.join(path)

    # extend the pythonpath with the ros2 site packages
    pythonpath = os.environ.get('PYTHONPATH').split(os.pathsep)
    pythonpath = ['C:\\ros2\\install\\Lib\\site-packages\\'] + pythonpath
    os.environ['PYTHONPATH'] = os.pathsep.join(pythonpath)

    # spawn a python process with extended environment
    subprocess.check_call([sys.executable, SCRIPT], env=dict(os.environ))