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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 main(name, options):
 """The main method for this script. :param name: The name of the VM to create. :type name: str :param template_name: The name of the template to use for creating \ the VM. :type template_name: str """

    server = config._config_value("general", "server", options.server)
    if server is None:
        raise ValueError("server must be supplied on command line"
                         " or in configuration file.")
    username = config._config_value("general", "username", options.username)
    if username is None:
        raise ValueError("username must be supplied on command line"
                         " or in configuration file.")
    password = config._config_value("general", "password", options.password)
    if password is None:
        raise ValueError("password must be supplied on command line"
                         " or in configuration file.")

    vm_template = None
    if options.template is not None:
        try:
            vm_template = template.load_template(options.template)
        except TemplateNotFoundError:
            print("ERROR: Template \"%s\" could not be found." % options.template)
            sys.exit(1)

    expected_opts = ["compute_resource", "datastore", "disksize", "nics",
                     "memory", "num_cpus", "guest_id", "host"]

    vm_opts = {}
    for opt in expected_opts:
        vm_opts[opt] = getattr(options, opt)
        if vm_opts[opt] is None:
            if vm_template is None:
                raise ValueError("%s not specified on the command line and"
                                 " you have not specified any template to"
                                 " inherit the value from." % opt)
            try:
                vm_opts[opt] = vm_template[opt]
            except AttributeError:
                raise ValueError("%s not specified on the command line and"
                                 " no value is provided in the specified"
                                 " template." % opt)

    client = Client(server=server, username=username, password=password)
    create_vm(client, name, vm_opts["compute_resource"], vm_opts["datastore"],
              vm_opts["disksize"], vm_opts["nics"], vm_opts["memory"],
              vm_opts["num_cpus"], vm_opts["guest_id"], host=vm_opts["host"])
    client.logout()