psspy module not found in PSS/E 34

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Your reputation indeed does precede you jconto! Thank you so much. It worked perfectly for me.

hi jconto.

I am trying to learn PSSE and python. Could you please give me the full code to import psspy. I am using PSSE Xplore 34 version.

Hi there,

The problem is due to that psspy.pyc is no longer in the same folder as the psse.exe, which is case for older versions.

To import the psspy module of PSSE Xplore 34, you should specify the two paths separately for sys.path and os.environ['PATH']. The following codes work if you installed your PSSE Xplore 34 in the default folder.

import os
import sys
sys_path_PSSE=r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSPY27'  #or where else you find the psspy.pyc
sys.path.append(sys_path_PSSE)
os_path_PSSE=r' C:\Program Files (x86)\PTI\PSSEXplore34\PSSBIN'  # or where else you find the psse.exe
os.environ['PATH'] += ';' + env_path_PSSE
import psspy

Here is my answer. I modified some different things I found and came up with this. You cannot execute psse34 because that is not the software package available with PSSExplore34. This code is located in the a folder titled "C:\IEEE39".

import os
import sys
import pdb


sys_path_PSSE=r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSPY27'  #or where else you find the psspy.pyc
sys.path.append(sys_path_PSSE)

os_path_PSSE=r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSBIN'  # or where else you find the psse.exe
os.environ['PATH'] += ';' + os_path_PSSE
os.environ['PATH'] += ';' + sys_path_PSSE


"""
PYTHONLIB = r'C:\Program Files (x86)\PTI\PSSE34EXplore\PSSLIB'
PYTHONPRM = r'C:\Program Files (x86)\PTI\PSSE34EXplore\PSSPRM'
MODELFOLDER = r'C:\IEEE39'

sys.path.append(PYTHONLIB)
sys.path.append(PYTHONPRM)
"""

import pssexplore34
import pssarrays
import redirect
import dyntools
import bsntools
import psspy

psspy.psseinit(39)

I then moved the pssexplore34.py file to the "C:\IEEE39" folder and commented out the portion of the code that was problematic. I am not sure if this is fool proof, but I am no longer getting the error.

import os, psseloc

_FPTH, _FNAM_EXT = os.path.split(os.path.abspath( __file__ ))
_FNAM, _FEXT     = os.path.splitext(_FNAM_EXT)
_PSSE_VRSN = int(_FNAM[-2:])

#EXAM_PATH = psseloc._set_psse_loc(_PSSE_VRSN, Xplore=True)