temp stays empty in getopt.getopt

When using the getopt.getopt() function in my python script the temp return value stays empty. What am I missing.

def ParseOpts(cmdName):
    shortForm = 'c:n:';
    longForm  = 'cluster=,node='.split(',');

    try:
        print sys.argv;
        temp, args = getopt.getopt(sys.argv, shortForm, longForm);
        print temp;
    except getopt.GetoptError:
        print 'error !!'

Command:

$ python helloWorld.py --cluster=Test --node=Test2
['helloWorld.py', '--cluster=Test', '--node=Test2']
[]