How to use the pyleri.Keyword function in pyleri

Prio,
    Choice,
    THIS,
    Ref,
    List,
    Grammar,
    KeywordError,
    ReKeywordsChangedError,
    NameAssignedError,
    MissingStartError,
    UnusedElementError)  # nopep8
from examples import JsonGrammar  # nopep8


class _TestGrammar1(Grammar):
    k_test = Keyword('test')
    k_ignore_case = Keyword('ignore_case', ign_case=True)
    START = Sequence(k_test, k_ignore_case)


class _TestGrammar2(Grammar):
    k_ni = Keyword('ni')
    s_seq = Sequence('(', THIS, ')')
    START = Prio(
        k_ni,
        s_seq,
        Sequence(THIS, Keyword('and'), THIS),
        Sequence(THIS, Keyword('or'), THIS))


class _TestGrammar3(Grammar):
    s_tic_tac = Sequence(Keyword('tic'), Keyword('tac'))

k_between = Keyword('between')
    k_count = Keyword('count')
    k_create = Keyword('create')
    k_critical = Keyword('critical')
    k_database = Keyword('database')
    k_dbname = Keyword('dbname')
    k_dbpath = Keyword('dbpath')
    k_debug = Keyword('debug')
    k_derivative = Keyword('derivative')
    k_difference = Keyword('difference')
    k_drop = Keyword('drop')
    k_drop_threshold = Keyword('drop_threshold')
    k_duration_log = Keyword('duration_log')
    k_duration_num = Keyword('duration_num')
    k_end = Keyword('end')
    k_error = Keyword('error')
    k_expression = Keyword('expression')
    k_false = Keyword('false')
    k_fifo_files = Keyword('fifo_files')
    k_filter = Keyword('filter')
    k_first = Keyword('first')
    k_float = Keyword('float')
    k_for = Keyword('for')
    k_from = Keyword('from')
    k_full = Keyword('full')
    k_grant = Keyword('grant')
    k_group = Keyword('group')
    k_groups = Keyword('groups')
    k_help = Choice(Keyword('help'), Token('?'))
    k_idle_percentage = Keyword('idle_percentage')
    k_idle_time = Keyword('idle_time')
    k_inf = Keyword('inf')

class JsonGrammar(Grammar):
    START = Ref()

    # JSON strings should be enclosed in double quotes.
    # A backslash can be used as escape character.
    r_string = Regex(r'(")(?:(?=(\\?))\2.)*?\1')

    # JSON does not support floats or integers prefixed with a + sign
    # and floats must start with a number, for example .5 is not allowed
    # but should be written like 0.5
    r_float = Regex(r'-?[0-9]+\.?[0-9]+')
    r_integer = Regex('-?[0-9]+')

    k_true = Keyword('true')
    k_false = Keyword('false')
    k_null = Keyword('null')

    json_map_item = Sequence(r_string, ':', START)

    json_map = Sequence('{', List(json_map_item), '}')
    json_array = Sequence('[', List(START), ']')

    START = Choice(
        r_string,
        r_float,
        r_integer,
        k_true,
        k_false,
        k_null,
        json_map,
        json_array)

Keyword('FPREG_64'),
                   Keyword('FPREG_32'),
                   Keyword('FPREG_16'),
                   Keyword('FPREG_8'),
                   Keyword('IMMEDIATE'),
                   Keyword('SIGNED_IMMEDIATE'),
                   Keyword('BITMASK_IMMEDIATE_32'),
                   Keyword('BITMASK_IMMEDIATE_64'),
                   Keyword('CONDITION'),
                   Keyword('INVERTED_CONDITION'),
                   Keyword('SYSREG'),
                   Keyword('PREFETCH_OP'),
                   Keyword('AT_INSTRUCTION'),
                   Keyword('TLBI_INSTRUCTION'),
                   Keyword('IC_INSTRUCTION'),
                   Keyword('DC_INSTRUCTION'),
                   Keyword('CONSTANT'),
                   Keyword('BARRIER_SCOPE'))
    type_property = Sequence(Keyword('TYPE'), types)
    bits = Regex('\'[0-9]+\'')
    integer = Regex('[0-9]+')
    number = Choice(bits, integer)
    multiple = Sequence(name, Token('*'), number)
    division = Sequence(name, Token('/'), number)
    addition = Sequence(name, Token('+'), number)
    subtraction = Sequence(name, Token('-'), number)
    subtraction_from = Sequence(number, Token('-'), name)
    encoded_property = Sequence(Keyword('ENCODED'), Choice(name, multiple, division, addition, subtraction, subtraction_from))
    default_property = Sequence(Keyword('DEFAULT'), Choice(name, number))
    multiple_of_property = Sequence(Keyword('MULTIPLE_OF'), number)
    constant_value_property = Sequence(Keyword('CONSTANT_VALUE'), imm_name)
    expr_property = Sequence(Keyword('EXPR'), Choice(name, multiple, division, addition, subtraction, subtraction_from, Keyword('PRESENCE')))

k_name = Keyword('name')
    k_ninf = Sequence('-', k_inf)
    k_now = Keyword('now')
    k_number = Keyword('number')
    k_online = Keyword('online')
    k_open_files = Keyword('open_files')
    k_or = Keyword('or')
    k_password = Keyword('password')
    k_points = Keyword('points')
    k_pool = Keyword('pool')
    k_pools = Keyword('pools')
    k_port = Keyword('port')
    k_prefix = Keyword('prefix')
    k_pvariance = Keyword('pvariance')
    k_read = Keyword('read')
    k_received_points = Keyword('received_points')
    k_reindex_progress = Keyword('reindex_progress')
    k_revoke = Keyword('revoke')
    k_select = Keyword('select')
    k_select_points_limit = Keyword('select_points_limit')
    k_selected_points = Keyword('selected_points')
    k_series = Keyword('series')
    k_server = Keyword('server')
    k_servers = Keyword('servers')
    k_set = Keyword('set')
    k_sid = Keyword('sid')
    k_shards = Keyword('shards')
    k_show = Keyword('show')
    k_size = Keyword('size')
    k_start = Keyword('start')
    k_startup_time = Keyword('startup_time')
    k_status = Keyword('status')

most_greedy=False)
    k_sync_progress = Keyword('sync_progress')
    k_tee_pipe_name = Keyword('tee_pipe_name')
    k_timeit = Keyword('timeit')
    k_timezone = Keyword('timezone')
    k_time_precision = Keyword('time_precision')
    k_to = Keyword('to')
    k_true = Keyword('true')
    k_type = Keyword('type')
    k_union = Choice(
        Tokens(', |'),
        Keyword('union'),
        most_greedy=False)
    k_uptime = Keyword('uptime')
    k_user = Keyword('user')
    k_users = Keyword('users')
    k_using = Keyword('using')
    k_uuid = Keyword('uuid')
    k_variance = Keyword('variance')
    k_version = Keyword('version')
    k_warning = Keyword('warning')
    k_where = Keyword('where')
    k_who_am_i = Keyword('who_am_i')
    k_write = Keyword('write')
    c_difference = Choice(
        Token('-'),
        k_difference,
        most_greedy=False)

    access_keywords = Choice(
        k_read,
        k_write,

k_status = Keyword('status')
    k_stddev = Keyword('stddev')
    k_string = Keyword('string')
    k_suffix = Keyword('suffix')
    k_sum = Keyword('sum')
    k_symmetric_difference = Choice(
        Token('^'),
        Keyword('symmetric_difference'),
        most_greedy=False)
    k_sync_progress = Keyword('sync_progress')
    k_tee_pipe_name = Keyword('tee_pipe_name')
    k_timeit = Keyword('timeit')
    k_timezone = Keyword('timezone')
    k_time_precision = Keyword('time_precision')
    k_to = Keyword('to')
    k_true = Keyword('true')
    k_type = Keyword('type')
    k_union = Choice(
        Tokens(', |'),
        Keyword('union'),
        most_greedy=False)
    k_uptime = Keyword('uptime')
    k_user = Keyword('user')
    k_users = Keyword('users')
    k_using = Keyword('using')
    k_uuid = Keyword('uuid')
    k_variance = Keyword('variance')
    k_version = Keyword('version')
    k_warning = Keyword('warning')
    k_where = Keyword('where')
    k_who_am_i = Keyword('who_am_i')
    k_write = Keyword('write')

k_integer = Keyword('integer')
    k_intersection = Choice(
        Token('&'),
        Keyword('intersection'),
        most_greedy=False)
    k_ip_support = Keyword('ip_support')
    k_last = Keyword('last')
    k_length = Keyword('length')
    k_libuv = Keyword('libuv')
    k_limit = Keyword('limit')
    k_list = Keyword('list')
    k_list_limit = Keyword('list_limit')
    k_log = Keyword('log')
    k_log_level = Keyword('log_level')
    k_max = Keyword('max')
    k_max_open_files = Keyword('max_open_files')
    k_mean = Keyword('mean')
    k_median = Keyword('median')
    k_median_low = Keyword('median_low')
    k_median_high = Keyword('median_high')
    k_mem_usage = Keyword('mem_usage')
    k_merge = Keyword('merge')
    k_min = Keyword('min')
    k_modify = Keyword('modify')
    k_nan = Keyword('nan')
    k_name = Keyword('name')
    k_ninf = Sequence('-', k_inf)
    k_now = Keyword('now')
    k_number = Keyword('number')
    k_online = Keyword('online')
    k_open_files = Keyword('open_files')
    k_or = Keyword('or')

k_mean = Keyword('mean')
    k_median = Keyword('median')
    k_median_low = Keyword('median_low')
    k_median_high = Keyword('median_high')
    k_mem_usage = Keyword('mem_usage')
    k_merge = Keyword('merge')
    k_min = Keyword('min')
    k_modify = Keyword('modify')
    k_nan = Keyword('nan')
    k_name = Keyword('name')
    k_ninf = Sequence('-', k_inf)
    k_now = Keyword('now')
    k_number = Keyword('number')
    k_online = Keyword('online')
    k_open_files = Keyword('open_files')
    k_or = Keyword('or')
    k_password = Keyword('password')
    k_points = Keyword('points')
    k_pool = Keyword('pool')
    k_pools = Keyword('pools')
    k_port = Keyword('port')
    k_prefix = Keyword('prefix')
    k_pvariance = Keyword('pvariance')
    k_read = Keyword('read')
    k_received_points = Keyword('received_points')
    k_reindex_progress = Keyword('reindex_progress')
    k_revoke = Keyword('revoke')
    k_select = Keyword('select')
    k_select_points_limit = Keyword('select_points_limit')
    k_selected_points = Keyword('selected_points')
    k_series = Keyword('series')
    k_server = Keyword('server')

k_expression = Keyword('expression')
    k_false = Keyword('false')
    k_fifo_files = Keyword('fifo_files')
    k_filter = Keyword('filter')
    k_first = Keyword('first')
    k_float = Keyword('float')
    k_for = Keyword('for')
    k_from = Keyword('from')
    k_full = Keyword('full')
    k_grant = Keyword('grant')
    k_group = Keyword('group')
    k_groups = Keyword('groups')
    k_help = Choice(Keyword('help'), Token('?'))
    k_idle_percentage = Keyword('idle_percentage')
    k_idle_time = Keyword('idle_time')
    k_inf = Keyword('inf')
    k_info = Keyword('info')
    k_ignore_threshold = Keyword('ignore_threshold')
    k_insert = Keyword('insert')
    k_integer = Keyword('integer')
    k_intersection = Choice(
        Token('&'),
        Keyword('intersection'),
        most_greedy=False)
    k_ip_support = Keyword('ip_support')
    k_last = Keyword('last')
    k_length = Keyword('length')
    k_libuv = Keyword('libuv')
    k_limit = Keyword('limit')
    k_list = Keyword('list')
    k_list_limit = Keyword('list_limit')
    k_log = Keyword('log')