Why are my getopts failing if I provide a username?

I am having a problem with my first functional python script I am writing, the complete working excerpt is below.

My problem is that if I include the username ( -u

or --username

) command line parameter , it is always empty and messes up other command line arguments.

For example, if I run this with command line arguments -n tdelane -s 10.1.213.226 -p xxx -v

, I get this as output:

cliloc = /usr/local/bin/cli
server = 
username = Administrator
password = 
verbose = True
o = -n
a = 
cliloc = /usr/local/bin/cli
server = 
username = 
password = 
verbose = True

      

        
        
        
      

    

As you can see, once it gets to -n

it, not only does it not install anything, it also doesn't process anything. If I take it -n

, it works. Running with -s 10.1.213.226 -p xxx -v

is the output:

cliloc = /usr/local/bin/cli
server = 
username = Administrator
password = 
verbose = True
o = -s
a = 10.1.213.226
o = -p
a = xxx
o = -v
a = 
cliloc = /usr/local/bin/cli
server = 10.1.213.226
username = Administrator
password = xxx
verbose = True

      

        
        
        
      

    

Here's the part of this script that matters:

import subprocess, getopt, sys, re

try:
    opts, args = getopt.getopt(sys.argv[1:], "cs:np:hv",                 
        ["cli", "server", "username", "password", "help", "verbose"])

except getopt.GetoptError as err:
    print str(err)
    usage()
    sys.exit(2)

cliloc = '/usr/local/bin/cli'
server = ''
username = 'Administrator'
password = ''
verbose = True

if verbose:
    print "cliloc = %s" % (cliloc)
    print "server = %s" % (server)
    print "username = %s" % (username)
    print "password = %s" % (password)
    print "verbose = %s" % (verbose)

for o, a in opts:
    if verbose:
        print 'o = ' + o
        print 'a = ' + a
    if o == "-v":
        verbose = True
    elif o in ("-h", "--help"):
        usage()
        sys.exit()
    elif o in ("-c", "--cli"):
        cliloc = a
    elif o in ("-s", "--server"):
        server = a
    elif o in ("-n", "--username"):
        username = a
    elif o in ("-p", "--password"):
        password = a
    else:
        assert False, "unhandled option"

if verbose:
    print "cliloc = %s" % (cliloc)
    print "server = %s" % (server)
    print "username = %s" % (username)
    print "password = %s" % (password)
    print "verbose = %s" % (verbose)

      

        
        
        
      

    

Thanks in advance!