Determine which shunts are toggling

edit

This should get you started. The following code will give you a string variable "temp" with the solution text. Now you just have to step through it and count how many times each shunt changes.

import redirect, sys, StringIO

# Redirect the output to a string, solve, then reset output
redirect.psse2py()
sys.stdout = temp = StringIO.StringIO()
psspy.fnsl([1,0,0,1,1,0,99,0])
redirect.py2psse()

# Convert temp to a normal string
temp = "" + temp.getvalue()

# Insert code to analyse the "temp" string and count shunt changes
# (This will differ depending on your PSSE version)
print temp