How to use the SIEMENS NX's "NXOpen" API in Python?

Question

The Python code I wanted to run is:

import nxopen as nx
import os

def get_mass_properties(file_path):

    if not os.path.exists(file_path):
        raise ValueError(f"File not found: {file_path}")
    if not os.access(file_path, os.R_OK):
        raise PermissionError(f"Insufficient permissions to access file: {file_path}")

    with nx.Session() as session:
        workpart = session.parts.open(file_path)

        bodies = workpart.bodies
        if len(bodies) != 1:
            raise RuntimeError("Unsupported file format: multiple solids found")
        solid_body = bodies[0]
        
        mass = solid_body.GetMass()

        massprop = [mass]

        workpart.close()
        session.close()

    return massprop

massproperties = get_mass_properties("D:/NX Files/model1.prt")

How do I use the NXOpen Python Library which accesses the NX CAD API? I tried installing the 'NXOpen' Library with pip and when I ran my code, I got this error:

Traceback (most recent call last):
  File "d:\Coding\NXOpen\basic 2.py", line 1, in <module>
    import nxopen as nx
  File "C:\Users\johan\AppData\Local\Programs\Python\Python311\Lib\site-packages\nxopen\__init__.py", line 1, in <module>
    from . import cad
  File "C:\Users\johan\AppData\Local\Programs\Python\Python311\Lib\site-packages\nxopen\cad\__init__.py", line 1, in <module>
    from .code import *
  File "C:\Users\johan\AppData\Local\Programs\Python\Python311\Lib\site-packages\nxopen\cad\code.py", line 3, in <module>
    import NXOpen
ModuleNotFoundError: No module named 'NXOpen'

PLease help me with this!