Tried to get VMware Fusion fencing to work with Fusion 5 from CentOS 6.4 pacemaker node (with Python 2.6.6). The functions for status, on and off were not functioning as expected.

I noticed a problem with the try-expect blocks and made the following change:

try:
conn.sendline('''IFS=$'\n';for x in $(mdfind vmwarevm |grep ".vmwarevm$"); do IFS=$'\n';find $x -name *vmx -exec grep -H "Address " {} ; ;done|sort|uniq''')
conn.log_expect(options, options["-c"], int(options["-g"]))
except pexpect.EOF:
fail(EC_CONNECTION_LOST)
except pexpect.TIMEOUT:
fail(EC_TIMED_OUT)
else: # ADDED THIS
results = conn.before.splitlines()[2:]
for line in results:
file, data = line.split(':', 1)
mac = data.split("= ")[1].strip(""")
mac_results.setdefault(file, []).append(mac)

...and added "else:" block to all the other similar places too. Seems to work correctly now as previously it never made it to the result handling.