Python pyparsing.Suppress() Examples

def __ifaceAttributes___storm_check(storm,dct):

    parse_level  = Word(alphas)        + Suppress('level ')            + restOfLine
    parse_action = Suppress('action ') + Word(alphas)
    parse_type   = Word(alphas)        + Suppress(Optional("include")) + Word(alphas)
    try:
        value = parse_level.parseString(storm).asList()
        if 'level' in dct:
            dct['level'].append(value)
        else:
            dct['level'] = [value]
        return dct
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_action, storm, 'action', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_type,   storm, 'type',   dct)
    except ParseException:
        pass 

def _parse(mystr):

    LBRACE, RBRACE, EQUAL = map(pp.Suppress, "{}=")
    field = pp.Word(pp.printables + ' ', excludeChars='[]=')
    field.addParseAction(pp.tokenMap(str.rstrip))
    string = pp.dblQuotedString().setParseAction(pp.removeQuotes)
    number = pp.pyparsing_common.number()
    date_expr = pp.Regex(r'\d\d\d\d-\d\d-\d\d')
    time_expr = pp.Regex(r'\d\d:\d\d:\d\d\.\d\d\d')
    nan = pp.Keyword('nan')
    scalar_value = (string | date_expr | time_expr | number | nan)

    list_marker = pp.Suppress("[]")
    value_list = pp.Forward()
    jobject = pp.Forward()

    memberDef1 = pp.Group(field + EQUAL + scalar_value)
    memberDef2 = pp.Group(field + EQUAL + jobject)
    memberDef3 = pp.Group(field + list_marker + EQUAL + LBRACE + value_list +
                          RBRACE)
    memberDef = memberDef1 | memberDef2 | memberDef3

    value_list <<= (pp.delimitedList(scalar_value, ",") |
                    pp.ZeroOrMore(pp.Group(pp.Dict(memberDef2))))
    value_list.setParseAction(lambda t: [pp.ParseResults(t[:])])

    members = pp.OneOrMore(memberDef)
    jobject <<= pp.Dict(LBRACE + pp.ZeroOrMore(memberDef) + RBRACE)
    # force empty jobject to be a dict
    jobject.setParseAction(lambda t: t or {})

    parser = members
    parser = pp.OneOrMore(pp.Group(pp.Dict(memberDef)))

    return parser.parseString(mystr) 

def grammar():
    parenthesis = Forward()
    parenthesis <<= "(" + ZeroOrMore(CharsNotIn("()") | parenthesis) + ")"

    field_def = OneOrMore(Word(alphanums + "_\"'`:-") | parenthesis)
    field_def.setParseAction(field_act)

    tablename_def = ( Word(alphas + "`_") | QuotedString("\"") )

    field_list_def = field_def + ZeroOrMore(Suppress(",") + field_def)
    field_list_def.setParseAction(field_list_act)

    create_table_def = Literal("CREATE") + "TABLE" + tablename_def.setResultsName("tableName") + "(" + field_list_def.setResultsName("fields") + ")" + ";"
    create_table_def.setParseAction(create_table_act)

    add_fkey_def = Literal("FOREIGN") + "KEY" + "(" + Word(alphanums).setResultsName("keyName") + ")" + "REFERENCES" + Word(alphanums).setResultsName("fkTable") + "(" + Word(alphanums + "_").setResultsName("fkCol") + ")" + Optional(Literal("DEFERRABLE")) + ";"
    add_fkey_def.setParseAction(add_fkey_act)

    other_statement_def = OneOrMore(CharsNotIn(";")) + ";"
    other_statement_def.setParseAction(other_statement_act)

    comment_def = "--" + ZeroOrMore(CharsNotIn("\n"))
    comment_def.setParseAction(other_statement_act)

    return OneOrMore(comment_def | create_table_def | add_fkey_def | other_statement_def) 

def parse(input_string):
        word = Word(alphanums)
        command = Group(OneOrMore(word))
        token = Suppress("->")
        device = Group(OneOrMore(word))
        argument = Group(OneOrMore(word))
        event = command + token + device + Optional(token + argument)
        parse_results = event.parseString(input_string)
        cmd = parse_results[0]
        dev = parse_results[1]
        cmd_str = "_".join(cmd)
        dev_str = "_".join(dev)
        try:
            val = parse_results[2]
        except IndexError:
            val_str = None
        else:
            val_str = "_".join(val)
        return cmd_str, dev_str, val_str 

def _globalParse___username_attributes(line):
    username_dict = {}

    username       = (Word(printables))                                         ('user')
    privilege      = (Suppress('privilege') + Word(nums))                       ('priv_num')
    password_type  = (Suppress(MatchFirst(['secret', 'password'])) + Word(nums))('pass_type')

    parse_username = username + Optional(privilege) + password_type + Suppress(restOfLine)

    result = parse_username.parseString(line)

    username_dict[result.user] = {}
    username_dict[result.user]['password_type'] = result.pass_type.asList()[0]

    try:
        username_dict[result.user]['privilege'] = result.priv_num.asList()[0]
    except AttributeError:
        pass

    return username_dict 

def _globalParse___stp_attributes(stp, dct):
    parse_portfast = Suppress('portfast ') + restOfLine
    parse_bpdu = Suppress('portfast bpduguard ') + restOfLine
    parse_loop = Suppress('loopguard ') + restOfLine
    try:
        return util.int_dict_parse(parse_bpdu, stp, 'bpduguard', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_loop, stp, 'loopguard', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_portfast, stp, 'portfast', dct)
    except ParseException:
        pass
    return 0 

def getLogLineBNF():
    global logLineBNF
    
    if logLineBNF is None:
        integer = Word( nums )
        ipAddress = delimitedList( integer, ".", combine=True )
        
        timeZoneOffset = Word("+-",nums)
        month = Word(string.uppercase, string.lowercase, exact=3)
        serverDateTime = Group( Suppress("[") + 
                                Combine( integer + "/" + month + "/" + integer +
                                        ":" + integer + ":" + integer + ":" + integer ) +
                                timeZoneOffset + 
                                Suppress("]") )
                         
        logLineBNF = ( ipAddress.setResultsName("ipAddr") + 
                       Suppress("-") +
                       ("-" | Word( alphas+nums+"@._" )).setResultsName("auth") +
                       serverDateTime.setResultsName("timestamp") + 
                       dblQuotedString.setResultsName("cmd").setParseAction(getCmdFields) +
                       (integer | "-").setResultsName("statusCode") + 
                       (integer | "-").setResultsName("numBytesSent")  + 
                       dblQuotedString.setResultsName("referrer").setParseAction(removeQuotes) +
                       dblQuotedString.setResultsName("clientSfw").setParseAction(removeQuotes) )
    return logLineBNF 

def _quoted(expr):
    return Combine(Suppress(Literal("'")) + expr + Suppress(Literal("'"))) 

def parse_line(attribute, string):

    Grammar = Suppress(Keyword('mpc.{}'.format(attribute)) + Keyword('=')) + String('data') + Suppress(Literal(';') + Optional(Comments))
    result, i, j = Grammar.scanString(string).next()

    return [int_else_float_except_string(s) for s in result['data'].asList()] 

def sym(sym):
  return p.Suppress(sym) 

def parse_table(attribute, string):
    Line = OneOrMore(Float)('data') + Literal(';') + Optional(Comments, default='')('name')
    Grammar = Suppress(Keyword('mpc.{}'.format(attribute)) + Keyword('=') + Keyword('[') + Optional(Comments)) + OneOrMore(Group(Line)) + Suppress(Keyword(']') + Optional(Comments))

    result, i, j = Grammar.scanString(string).next()

    _list = list()
    for r in result:
        _list.append([int_else_float_except_string(s) for s in r['data'].asList()])

    return _list 

def __init__(self):
        if PYPARSING:
            category = Word(alphas + "_-*", alphanums + "_-*")
            operator = oneOf("and or ,")
            neg_operator = "not"
            elementRef = category
            definition = elementRef + ZeroOrMore(operator + elementRef)
            nestedformula = Group(Suppress(Optional(Literal("("))) + definition + Suppress(Optional(Literal(")"))))
            neg_nestedformula = Optional(neg_operator) + nestedformula
            self.finalformula = neg_nestedformula + ZeroOrMore(operator + neg_nestedformula)

            elementRef.setParseAction(self.__compute_element)
            neg_nestedformula.setParseAction(self.__compute_neg_formula)
            nestedformula.setParseAction(self.__compute_formula)
            self.finalformula.setParseAction(self.__myreduce) 

def GetParams(s):
  """Extracts args and kwargs from string."""
  # modified from https://stackoverflow.com/questions/38799223/parse-string-to-identify-kwargs-and-args  # pylint: disable=line-too-long

  _lparen = Suppress("(")  # pylint: disable=invalid-name
  _rparen = Suppress(")")  # pylint: disable=invalid-name
  _eq = Suppress("=")  # pylint: disable=invalid-name

  data = (_lparen + Optional(
      delimitedList(
          Group(Regex(r"[^=,)\s]+") + Optional(_eq + Regex(u"[^,)]*")))
          )
      ) + _rparen)

  items = data.parseString(s).asList()

  # need to make sure that kwargs only happen after args are processed
  args = [Num(i[0]) for i in items if len(i) == 1]
  kwargs = {i[0]: Num(i[1]) for i in items if len(i) == 2}

  # check for syntax error
  for i in range(1, len(items)):
    if (len(items[i]) == 1) and (len(items[i-1]) == 2):
      raise SyntaxError

  return args, kwargs 

def get_fragment_language() -> ParserElement:
    """Build a protein fragment parser."""
    _fragment_value_inner = fragment_range | missing_fragment(FRAGMENT_MISSING)
    _fragment_value = _fragment_value_inner | And([Suppress('"'), _fragment_value_inner, Suppress('"')])
    parser_element = fragment_tag + nest(_fragment_value + Optional(WCW + quote(FRAGMENT_DESCRIPTION)))
    return parser_element 

def parse(self, flags):
        _flags = []
        for k, v in flags.items():
            if v == True:
                _flags.append(k)
            elif v in [False, None]:
                pass
            else:
                _flags.append(k + "_" + v)

        def cb_conditional(s, l, t):
            if (t.cond in _flags) != (t.negate == "!"):
                return t.expr
            else:
                return []

        word = Word(alphanums + ":<>.[]_-,=~/^~")
        conditional = Forward()
        conditional << (
            Optional("!")("negate")
            + word("cond")
            + Suppress("?")
            + Suppress("(")
            + OneOrMore(conditional ^ word)("expr")
            + Suppress(")")
        ).setParseAction(cb_conditional)
        string = word
        string_list = OneOrMore(conditional ^ string)
        s = " ".join(string_list.parseString(self.__str__()))
        logger.debug(
            "Parsing '{}' with flags {} => {}".format(self.__str__(), str(_flags), s)
        )
        return s 

def _globalParse___vtp_attributes(vtp, dct):
    parse_domain = Suppress('domain ') + restOfLine
    parse_mode = Suppress('mode ') + restOfLine
    try:
        return util.int_dict_parse(parse_domain, vtp, 'domain', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_mode, vtp, 'mode', dct)
    except ParseException:
        pass
    return 0 

def __ifaceAttributes___ip_parse(value, dct):
    parse_mode = Word(alphas)
    parse_rate = Suppress('limit rate ') + restOfLine
    try:
        return util.int_dict_parse(parse_rate, value, 'limit', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_mode, value, 'mode', dct)
    except ParseException:
        pass 

def __init__(self):
        # create parsing grammer
        sQStringLiteral = pyparsing.QuotedString("'")
        sQStringLiteral.setParseAction(
            lambda s, loc, toks: StringLiteral(s, loc, toks, False))

        dQStringLiteral = pyparsing.QuotedString('"', '\\')
        dQStringLiteral.setParseAction(
            lambda s, loc, toks: StringLiteral(s, loc, toks, True))

        stringLiteral = sQStringLiteral | dQStringLiteral

        functionCall = pyparsing.Forward()
        functionArg = stringLiteral | functionCall
        functionCall << pyparsing.Word(pyparsing.alphas, pyparsing.alphanums+'-') + \
            pyparsing.Suppress('(') + \
            pyparsing.Optional(functionArg +
                pyparsing.ZeroOrMore(pyparsing.Suppress(',') + functionArg)) + \
            pyparsing.Suppress(')')
        functionCall.setParseAction(
            lambda s, loc, toks: FunctionCall(s, loc, toks))

        predExpr = pyparsing.infixNotation(
            stringLiteral ^ functionCall ,
            [
                ('!',  1, pyparsing.opAssoc.RIGHT, lambda s, loc, toks: NotOperator(s, loc, toks)),
                ('<',  2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('<=', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('>',  2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('>=', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('==', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('!=', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryStrOperator)),
                ('&&', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryBoolOperator)),
                ('||', 2, pyparsing.opAssoc.LEFT,  infixBinaryOp(BinaryBoolOperator))
            ])

        self.__ifgrammer = predExpr 

def __ifaceAttributes___port_sec_parse(port, dct):
    parse_aging_time = Suppress('aging time ') + restOfLine
    parse_aging_type = Suppress('aging type ') + restOfLine
    parse_violat = Suppress('violation ') + restOfLine
    parse_max = Suppress('maximum ') + restOfLine
    parse_mac = Suppress('mac-address ') + Optional('sticky') + restOfLine
    try:
        return util.int_dict_parse(parse_aging_time, port, 'aging time', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_aging_type, port, 'aging type', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_violat, port, 'violation', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_mac, port, 'mac-address', dct)
    except ParseException:
        pass
    try:
        return util.int_dict_parse(parse_max, port, 'maximum', dct)
    except ParseException:
        pass 

def get_attributes(config):
    options_list = []
    option = White(exact=1) + Suppress(Optional(White())) + restOfLine
    next_line = config.readline()
    try:
        option_parse = option.parseString(next_line)
        while option_parse[0] == ' ':
            options_list.append(option_parse[-1])
            next_line = config.readline()
            option_parse = option.parseString(next_line)
    except:
        pass
    return options_list, next_line 

def __init__(
        self,
        namespace_to_term_to_encoding: Optional[NamespaceTermEncodingMapping] = None,
        namespace_to_pattern: Optional[Mapping[str, Pattern]] = None,
        default_namespace: Optional[Set[str]] = None,
        allow_naked_names: bool = False,
        skip_validation: bool = False,
    ) -> None:
        """Initialize the concept parser.

        :param namespace_to_term_to_encoding: A dictionary of {namespace: {(identifier, name): encoding}}
        :param namespace_to_pattern: A dictionary of {namespace: regular expression string} to compile
        :param default_namespace: A set of strings that can be used without a namespace
        :param allow_naked_names: If true, turn off naked namespace failures
        """
        self.identifier_fqualified = (
            word(NAMESPACE)
            + Suppress(':')
            + (word | quote)(IDENTIFIER)
            + Suppress('!')
            + (word | quote)(NAME)
        )
        self.identifier_qualified = word(NAMESPACE) + Suppress(':') + (word | quote)(NAME)

        if namespace_to_term_to_encoding is not None:
            self.namespace_to_name_to_encoding = defaultdict(dict)
            self.namespace_to_identifier_to_encoding = defaultdict(dict)
            for namespace, term_mapping in namespace_to_term_to_encoding.items():
                for (identifier, name), encoding in term_mapping.items():
                    self.namespace_to_name_to_encoding[namespace][name] = encoding
                    self.namespace_to_identifier_to_encoding[namespace][identifier] = encoding

            self.namespace_to_name_to_encoding = dict(self.namespace_to_name_to_encoding)
            self.namespace_to_identifier_to_encoding = dict(self.namespace_to_identifier_to_encoding)
        else:
            self.namespace_to_name_to_encoding = {}
            self.namespace_to_identifier_to_encoding = {}

        if not skip_validation:
            self.identifier_fqualified.setParseAction(self.handle_identifier_fqualified)
            self.identifier_qualified.setParseAction(self.handle_identifier_qualified)

        self.namespace_to_pattern = namespace_to_pattern or {}
        self.default_namespace = set(default_namespace) if default_namespace is not None else None
        self.allow_naked_names = allow_naked_names

        self.identifier_bare = (word | quote)(NAME)
        self.identifier_bare.setParseAction(
            self.handle_namespace_default if self.default_namespace else
            self.handle_namespace_lenient if self.allow_naked_names else
            self.handle_namespace_invalid,
        )

        super().__init__(
            self.identifier_fqualified | self.identifier_qualified | self.identifier_bare,
        ) 

def jsParse(inStr):
	# This disaster is a context-free grammar parser for parsing javascript object literals.
	# It needs to be able to handle a lot of the definitional messes you find in in-the-wild
	# javascript object literals.
	# Unfortunately, Javascript is /way/ more tolerant then JSON when it comes to object literals
	# so we can't just parse objects using python's `json` library.

	TRUE = pp.Keyword("true").setParseAction( pp.replaceWith(True) )
	FALSE = pp.Keyword("false").setParseAction( pp.replaceWith(False) )
	NULL = pp.Keyword("null").setParseAction( pp.replaceWith(None) )

	jsonString = pp.quotedString.setParseAction( pp.removeQuotes )
	jsonNumber = pp.Combine( pp.Optional('-') + ( '0' | pp.Word('123456789',pp.nums) ) +
											pp.Optional( '.' + pp.Word(pp.nums) ) +
											pp.Optional( pp.Word('eE',exact=1) + pp.Word(pp.nums+'+-',pp.nums) ) )

	jsonObject   = pp.Forward()
	jsonValue    = pp.Forward()
	jsonDict     = pp.Forward()
	jsonArray    = pp.Forward()
	jsonElements = pp.Forward()

	rawText      = pp.Regex('[a-zA-Z_$][0-9a-zA-Z_$]*')

	commaToNull = pp.Word(',,', exact=1).setParseAction(pp.replaceWith(None))
	jsonElements << pp.ZeroOrMore(commaToNull) + pp.Optional(jsonObject) + pp.ZeroOrMore((pp.Suppress(',') + jsonObject) | commaToNull)

	jsonValue << ( jsonString | jsonNumber | TRUE | FALSE | NULL )


	dictMembers = pp.delimitedList( pp.Group( (rawText | jsonString) + pp.Suppress(':') + (jsonValue | jsonDict | jsonArray)))
	jsonDict << ( pp.Dict( pp.Suppress('{') + pp.Optional(dictMembers) + pp.ZeroOrMore(pp.Suppress(',')) + pp.Suppress('}') ) )
	jsonArray << ( pp.Group(pp.Suppress('[') + pp.Optional(jsonElements) + pp.Suppress(']') ) )
	jsonObject << (jsonValue | jsonDict | jsonArray)

	jsonComment = pp.cppStyleComment
	jsonObject.ignore( jsonComment )

	def convertDict(s, l, toks):

		return dict(toks.asList())

	def convertNumbers(s,l,toks):
		n = toks[0]
		try:
			return int(n)
		except ValueError:
			return float(n)

	jsonNumber.setParseAction(convertNumbers)
	jsonDict.setParseAction(convertDict)

	# jsonObject.setDebug()
	jsonObject.parseString('"inStr"').pop()
	return jsonObject.parseString(inStr).pop()


# Stolen from http://stackoverflow.com/a/12017573/268006 

def main():  
    word = Word(alphanums)  
    command = Group(OneOrMore(word))  
    token = Suppress("->")  
    device = Group(OneOrMore(word))  
    argument = Group(OneOrMore(word))  
    event = command + token + device + Optional(token + argument)  
 
    gate = Gate()  
    garage = Garage()  
    airco = Aircondition()  
    heating = Heating()  
    boiler = Boiler()  
    fridge = Fridge()  

    tests = ('open -> gate',  
             'close -> garage',  
             'turn on -> air condition',  
             'turn off -> heating',  
             'increase -> boiler temperature -> 5 degrees',  
             'decrease -> fridge temperature -> 2 degrees')  

    open_actions = {'gate':gate.open, 
                    'garage':garage.open, 
                    'air condition':airco.turn_on,  
                    'heating':heating.turn_on, 
                    'boiler temperature':boiler.increase_temperature,  
                    'fridge temperature':fridge.increase_temperature}  
    close_actions = {'gate':gate.close, 
                     'garage':garage.close, 
                     'air condition':airco.turn_off,  
                     'heating':heating.turn_off, 
                     'boiler temperature':boiler.decrease_temperature,  
                     'fridge temperature':fridge.decrease_temperature}  

    for t in tests:  
        if len(event.parseString(t)) == 2: # no argument  
            cmd, dev = event.parseString(t)  
            cmd_str, dev_str = ' '.join(cmd), ' '.join(dev)  
            if 'open' in cmd_str or 'turn on' in cmd_str:  
                open_actions[dev_str]()  
            elif 'close' in cmd_str or 'turn off' in cmd_str:  
                close_actions[dev_str]()  
        elif len(event.parseString(t)) == 3: # argument  
            cmd, dev, arg = event.parseString(t)  
            cmd_str = ' '.join(cmd)
            dev_str = ' '.join(dev)
            arg_str = ' '.join(cmd)
            num_arg = 0  
            try:  
                # extract the numeric part
                num_arg = int(arg_str.split()[0])  
            except ValueError as err:  
                print(f"expected number but got: '{arg_str[0]}'")  
            if 'increase' in cmd_str and num_arg > 0:  
                open_actions[dev_str](num_arg)  
            elif 'decrease' in cmd_str and num_arg > 0:  
                close_actions[dev_str](num_arg) 

def parser(self):
        """
        This function returns a parser.
        The grammar should be like most full text search engines (Google, Tsearch, Lucene).

        Grammar:
        - a query consists of alphanumeric words, with an optional '*' wildcard
          at the end of a word
        - a sequence of words between quotes is a literal string
        - words can be used together by using operators ('and' or 'or')
        - words with operators can be grouped with parenthesis
        - a word or group of words can be preceded by a 'not' operator
        - the 'and' operator precedes an 'or' operator
        - if an operator is missing, use an 'and' operator
        """
        operatorOr = Forward()

        operatorWord = Word(wordchars).setResultsName('value')

        operatorQuotesContent = Forward()
        operatorQuotesContent << (
            (operatorWord + operatorQuotesContent) | operatorWord
            )

        operatorQuotes = Group(
            Suppress('"') + operatorQuotesContent + Suppress('"')
        ).setResultsName("quotes") | operatorWord

        prefix = (Word(alphanums).setResultsName('index') + Word('=').setResultsName('binop'))
        operatorParenthesis = Group(
            Optional(prefix) +
            (Suppress("(") + operatorOr + Suppress(")"))
        ).setResultsName("parenthesis") | Group(prefix + operatorQuotes).setResultsName('term') | operatorQuotes

        operatorNot = Forward()
        operatorNot << (Group(
            Suppress(Keyword("not", caseless=True)) + operatorNot
        ).setResultsName("not") | operatorParenthesis)

        operatorAnd = Forward()
        operatorAnd << (Group(
            operatorNot + Suppress(Keyword("and", caseless=True)) + operatorAnd
        ).setResultsName("and") | Group(
            operatorNot + OneOrMore(~oneOf("and or", caseless=True) + operatorAnd)
        ).setResultsName("and") | operatorNot)

        operatorProximity = Forward()
        operatorProximity << (Group(
            operatorParenthesis + Suppress(Literal("near,")) + Word(nums).setResultsName('distance') + operatorParenthesis
        ).setResultsName("near") | Group(
            operatorParenthesis + Suppress(Literal("span,")) + Word(nums).setResultsName('distance') + operatorParenthesis
        ).setResultsName("span") | operatorAnd)

        operatorOr << (Group(
            operatorProximity + Suppress(Keyword("or", caseless=True)) + operatorOr
        ).setResultsName("or") | operatorProximity)

        return operatorOr.parseString 

def main():
    word = Word(alphanums)
    command = Group(OneOrMore(word))
    token = Suppress("->")
    device = Group(OneOrMore(word))
    argument = Group(OneOrMore(word))
    event = command + token + device + Optional(token + argument)

    gate = Gate()
    garage = Garage()
    airco = Aircondition()
    heating = Heating()
    boiler = Boiler()
    fridge = Fridge()

    tests = ('open -> gate',
             'close -> garage',
             'turn on -> aircondition',
             'turn off -> heating',
             'increase -> boiler temperature -> 5 degrees',
             'decrease -> fridge temperature -> 2 degrees')

    open_actions = {'gate':gate.open, 'garage':garage.open, 'aircondition':airco.turn_on,
                  'heating':heating.turn_on, 'boiler temperature':boiler.increase_temperature,
                  'fridge temperature':fridge.increase_temperature}
    close_actions = {'gate':gate.close, 'garage':garage.close, 'aircondition':airco.turn_off,
                   'heating':heating.turn_off, 'boiler temperature':boiler.decrease_temperature,
                   'fridge temperature':fridge.decrease_temperature}

    for t in tests:
        if len(event.parseString(t)) == 2: # no argument
            cmd, dev = event.parseString(t)
            cmd_str, dev_str = ' '.join(cmd), ' '.join(dev)
            if 'open' in cmd_str or 'turn on' in cmd_str:
                open_actions[dev_str]()
            elif 'close' in cmd_str or 'turn off' in cmd_str:
                close_actions[dev_str]()
        elif len(event.parseString(t)) == 3: # argument
            cmd, dev, arg = event.parseString(t)
            cmd_str, dev_str, arg_str = ' '.join(cmd), ' '.join(dev), ' '.join(arg)
            num_arg = 0
            try:
                num_arg = int(arg_str.split()[0]) # extract the numeric part
            except ValueError as err:
                print("expected number but got: '{}'".format(arg_str[0]))
            if 'increase' in cmd_str and num_arg > 0:
                open_actions[dev_str](num_arg)
            elif 'decrease' in cmd_str and num_arg > 0:
                close_actions[dev_str](num_arg) 

def main():
    word = Word(alphanums)
    command = Group(OneOrMore(word))
    token = Suppress("->")
    device = Group(OneOrMore(word))
    argument = Group(OneOrMore(word))
    event = command + token + device + Optional(token + argument)

    gate = Gate()
    garage = Garage()
    airco = Aircondition()
    heating = Heating()
    boiler = Boiler()
    fridge = Fridge()

    tests = ('open -> gate',
             'close -> garage',
             'turn on -> aircondition',
             'turn off -> heating',
             'increase -> boiler temperature -> 20 degrees',
             'decrease -> fridge temperature -> 6 degree')

    open_actions = {'gate':gate.open, 'garage':garage.open, 'aircondition':airco.turn_on,
                  'heating':heating.turn_on, 'boiler temperature':boiler.increase_temperature,
                  'fridge temperature':fridge.increase_temperature}
    close_actions = {'gate':gate.close, 'garage':garage.close, 'aircondition':airco.turn_off,
                   'heating':heating.turn_off, 'boiler temperature':boiler.decrease_temperature,
                   'fridge temperature':fridge.decrease_temperature}

    for t in tests:
        if len(event.parseString(t)) == 2: # no argument
            cmd, dev = event.parseString(t)
            cmd_str, dev_str = ' '.join(cmd), ' '.join(dev)
            if 'open' in cmd_str or 'turn on' in cmd_str:
                open_actions[dev_str]()
            elif 'close' in cmd_str or 'turn off' in cmd_str:
                close_actions[dev_str]()
        elif len(event.parseString(t)) == 3: # argument
            cmd, dev, arg = event.parseString(t)
            cmd_str, dev_str, arg_str = ' '.join(cmd), ' '.join(dev), ' '.join(arg)
            num_arg = 0
            try:
                num_arg = int(arg_str.split()[0]) # extract the numeric part
            except ValueError as err:
                print("expected number but got: '{}'".format(arg_str[0]))
            if 'increase' in cmd_str and num_arg > 0:
                open_actions[dev_str](num_arg)
            elif 'decrease' in cmd_str and num_arg > 0:
                close_actions[dev_str](num_arg) 

def parser(self):
        """
        This function returns a parser.
        The grammar should be like most full text search engines (Google, Tsearch, Lucene).
        
        Grammar:
        - a query consists of alphanumeric words, with an optional '*' wildcard
          at the end of a word
        - a sequence of words between quotes is a literal string
        - words can be used together by using operators ('and' or 'or')
        - words with operators can be grouped with parenthesis
        - a word or group of words can be preceded by a 'not' operator
        - the 'and' operator precedes an 'or' operator
        - if an operator is missing, use an 'and' operator
        """
        operatorOr = Forward()
        
        operatorWord = Group(Combine(Word(alphanums) + Suppress('*'))).setResultsName('wordwildcard') | \
                            Group(Word(alphanums)).setResultsName('word')
        
        operatorQuotesContent = Forward()
        operatorQuotesContent << (
            (operatorWord + operatorQuotesContent) | operatorWord
        )
        
        operatorQuotes = Group(
            Suppress('"') + operatorQuotesContent + Suppress('"')
        ).setResultsName("quotes") | operatorWord
        
        operatorParenthesis = Group(
            (Suppress("(") + operatorOr + Suppress(")"))
        ).setResultsName("parenthesis") | operatorQuotes

        operatorNot = Forward()
        operatorNot << (Group(
            Suppress(Keyword("not", caseless=True)) + operatorNot
        ).setResultsName("not") | operatorParenthesis)

        operatorAnd = Forward()
        operatorAnd << (Group(
            operatorNot + Suppress(Keyword("and", caseless=True)) + operatorAnd
        ).setResultsName("and") | Group(
            operatorNot + OneOrMore(~oneOf("and or") + operatorAnd)
        ).setResultsName("and") | operatorNot)
        
        operatorOr << (Group(
            operatorAnd + Suppress(Keyword("or", caseless=True)) + operatorOr
        ).setResultsName("or") | operatorAnd)

        return operatorOr.parseString