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Description:

pssepath 0.2.3

pssepath - Easy PSSE Python coding
author: whit. (whit.com.au)
pssepath simplifies the code required to setup the Python environment necessary
to use the PSSE API. Using pssepath all you have to do is::
import pssepath
pssepath.add_pssepath()

import psspy

Tested and works on:

PSSE 32
PSSE 33
PSSE 34
PSSE 35

Supports 32 and 64 bit windows (and provides warnings when using mismatched 64
bit python when PSSE requires 32 bit python).
Using this module makes the PSSE system files available for use while avoiding
making modifications to system paths or hardcoding the location of the PSSE
system folders. This makes PSSE easy to use.
Without pssepath, you have to do something like this::
import os
import sys

PSSE_LOCATION = r"C:\Program Files\PTI\PSSE32\PSSBIN"
sys.path.append(PSSE_LOCATION)
os.environ['PATH'] = os.environ['PATH'] + ';' + PSSE_LOCATION

import psspy

Furthermore, by including pssepath with any scripts you distribute, others will
be able to use your code without having to edit your code to suit their
varying install paths (such as different versions of PSSE).
It can also provide information about which version of Python to use with a
particular install of PSSE to avoid ImportError: Bad magic number....
Installation
pip install pssepath
or copy the pssepath code directory (the dir that contains core.py) to your
project's root directory.
Usage
pssepath provides 3 methods for setting up the PSSE paths:

pssepath.add_pssepath()
Adds the most recent version of PSSE that works with the currently
running version of Python.

pssepath.add_pssepath(<version>)
Adds the requested version of PSSE. Remember that specifying a version
number may make your code less portable if you or your colleagues ever use a
different version. pssepath.add_pssepath(33)

pssepath.select_pssepath()
Produces a menu of all the PSSE and Python installs on your system,
along with the required version of Python.

If you have set up your system to have the PSSE system files on the system path
at all times, pssepath will only use these files.
For information about the PSSE versions installed on your system, either:

execute the pssepath.py file from windows; or
run python -m pssepath.pssepathinfo You may have to specify the python
install path: ie. c:\Python25\python -m pssepath.pssepathinfo or py.exe -2.5 -m pssepath.pssepathinfo

This will provide you with a summary similar to the following::
Found the following versions of PSSE installed:

1. PSSE version 32
Requires Python 2.5-32bit (Current running Python)
2. PSSE version XX
Requires Python 2.X-32bit (Installed)
3. PSSE version XX
Requires Python 2.X-32bit

Found the following Python installations:
2.5-32bit (currently running):
PythonCore: C:\Python25\
3.7-64bit:
PythonCore: C:\Users\dan\AppData\Local\Programs\Python\Python37\

The status next to the Python version indicates the installation status of the
required Python for the particular PSSE install.

Current running Python
indicates the Python version used to invoke the script
(c:\Python25\python.exe if invoked as c:\Python25\python.exe -m pssepath) is
appropriate for that version of PSSE.

Installed
indicates that a Python version different to the one used to invoke the
script is required for that PSSE version, but that it is already installed
on your system.

<nothing>
The absence of a status means that a different version of Python is
required to run that version of PSSE and it is not installed on your
system. As Python comes bundled with PSSE, this status is unlikely.
Ensuring you use the correct version of Python for the version of PSSE you are
running will avoid seeing ImportError: Bad magic number... ever again.
License
This program is released under the very permissive MIT license. You may freely
use it for commercial purposes, without needing to provide modified source.
Read the LICENSE file for more information.
Tips on managing multiple Python versions
I like to use batch files that point to a specific python version. For
example::
$ more C:\bin\python25.bat
@C:\Python25\python.exe %*

Where the PATH includes c:\bin. Now you can run python scripts with the
command::
python25 myscript.py args

instead of:
c:\Python25\python.exe myscript.py args

Contributers
Discussion about this module was conducted at the Python for PSSE Forum involving the following members:

Daniel Hillier
JervisW
Chip Webber

Improvements or suggestions
Visit the Python for PSSE Forum
See also:

github: https://github.com/danifus/pssepath
contact: daniel@whit.com.au

For any other questions about Python and PSSE, feel free to raise them on the
Python for PSSE Forum