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Python 3.7 w/ PSSE 34

asked 2020-09-10 14:48:10 -0500

kewasiuk gravatar image

updated 2020-09-10 14:48:49 -0500

Hi all. I'm getting the bad magic number error when trying to run PSSE 34 with Python 3.7. I can run it with Python 2.7 fine, however. I noticed there are two psspy paths:

psspy34 = r'C:\Program Files (x86)\PTI\PSSE34\PSSPY27'

psspy34py3 = r'C:\Program Files (x86)\PTI\PSSE34\PSSPY34'

Would it have to be Python 3.4 with PSSE 34?

Edit: I checked if my Python 3.7 installation is 64-bit and it is--perhaps this is the cause.

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answered 2020-09-10 19:13:05 -0500

jconto gravatar image

Python 3.7 64-bit cannot be use with PSSe v.34 which is a 32-bit application. All usable python versions has to be 32-bit. That is cause of the magic number error.

When you install PSSe v.34.7, there are three psspy folders:

psspy27 - to be used with python 2.7
psspy34 - to be used with python 3.4 
psspy37 - to be used with python 3.7

To run PSSe from its GUI, edit the PSSe v.34 link icon by right-clicking and edit its "Target" field:

"C:\Program Files (x86)\PTI\PSSE34\PSSBIN\psse34.exe" -pyver 37

To run python scripts outside PSSe GUI, in a command line box (=DOS window), add the PSSE PSSBIN folder path to the PATH environ variable and use the full path for python.exe corresponding to v.37:

c:\..>c:\python37\python <python script>

To run a python script with PSSe 34.7 with python v.3.7, the path to psspy37 have to be added to the sys.path:

psspy37path = r'C:\Program Files (x86)\PTI\PSSE34\PSSPY37'
import psspy

To verify the python version and the psspy version, add to your python code:

print('Python ver %s'%sys.version)
print (psspy.psseversion())
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Thanks jconto! Always appreciate your thoughtful replies. Cheers.

kewasiuk gravatar imagekewasiuk ( 2020-09-11 08:58:36 -0500 )edit

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Asked: 2020-09-10 14:48:10 -0500

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Last updated: Sep 10