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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def muninMain(pluginClass, argv=None, env=None, debug=False):
 """Main Block for Munin Plugins. @param pluginClass: Child class of MuninPlugin that implements plugin. @param argv: List of command line arguments to Munin Plugin. @param env: Dictionary of environment variables passed to Munin Plugin. @param debug: Print debugging messages if True. (Default: False) """

    if argv is None:
        argv = sys.argv
    if env is None:
        env = os.environ
    debug = debug or env.has_key('MUNIN_DEBUG')
    if len(argv) > 1 and argv[1] == 'autoconf':
        autoconf = True
    else:
        autoconf = False
    try:
        plugin = pluginClass(argv, env, debug)
        ret = plugin.run()
        if ret:
            return 0
        else:
            return 1
    except Exception:
        print >> sys.stderr, "ERROR: %s" % repr(sys.exc_info()[1])
        if autoconf:
            print "no"
        if debug:
            raise
        else:
            if autoconf:
                return 0
            else:
                return 1