No module named 'plxscripting'

Hi everybody. I am trying to run this code and I got  the error that shows No module named 'plxscripting'. could you help me.

#Connect with PLAXISOutput
localhostport_input = 10000
from plxscripting.easy import *
s_og_o = new_server('localhost', localhostport_output, password='**************')
plaxis_path = r'C:\Program Files\Bentley\Geotechnical\PLAXIS 2D CONNECT Edition V21\Plaxis2DOutput.exe'

import imp
found_module = imp.find_module('plxscripting', [plaxis path])
plxscripting = imp.load_module('plxscripting', *found_module)
from plxscripting.easy import *

s_o,g_o = new_server('localhost', localhostport_output)