How to use the pygments.token.Operator function in Pygments

"""

    name = 'Boo'
    aliases = ['boo']
    filenames = ['*.boo']
    mimetypes = ['text/x-boo']

    tokens = {
        'root': [
            (r'\s+', Text),
            (r'(#|//).*$', Comment.Single),
            (r'/[*]', Comment.Multiline, 'comment'),
            (r'[]{}:(),.;[]', Punctuation),
            (r'\\\n', Text),
            (r'\\', Text),
            (r'(in|is|and|or|not)\b', Operator.Word),
            (r'/(\\\\|\\[^\\]|[^/\\\s])/', String.Regex),
            (r'@/(\\\\|\\[^\\]|[^/\\])*/', String.Regex),
            (r'=~|!=|==|<<|>>|[-+/*%=<>&^|]', Operator),
            (r'(as|abstract|callable|constructor|destructor|do|import|'
             r'enum|event|final|get|interface|internal|of|override|'
             r'partial|private|protected|public|return|set|static|'
             r'struct|transient|virtual|yield|super|and|break|cast|'
             r'continue|elif|else|ensure|except|for|given|goto|if|in|'
             r'is|isa|not|or|otherwise|pass|raise|ref|try|unless|when|'
             r'while|from|as)\b', Keyword),
            (r'def(?=\s+\(.*?\))', Keyword),
            (r'(def)(\s+)', bygroups(Keyword, Text), 'funcname'),
            (r'(class)(\s+)', bygroups(Keyword, Text), 'classname'),
            (r'(namespace)(\s+)', bygroups(Keyword, Text), 'namespace'),
            (r'(?

name = 'Python'
    aliases = ['python', 'py']
    filenames = ['*.py', '*.pyw', '*.sc', 'SConstruct', 'SConscript', '*.tac']
    mimetypes = ['text/x-python', 'application/x-python']

    tokens = {
        'root': [
            (r'\n', Text),
            (r'^(\s*)("""(?:.|\n)*?""")', bygroups(Text, String.Doc)),
            (r"^(\s*)('''(?:.|\n)*?''')", bygroups(Text, String.Doc)),
            (r'[^\S\n]+', Text),
            (r'#.*$', Comment),
            (r'[]{}:(),;[]', Punctuation),
            (r'\\\n', Text),
            (r'\\', Text),
            (r'(in|is|and|or|not)\b', Operator.Word),
            (r'!=|==|<<|>>|[-~+/*%=<>&^|.]', Operator),
            include('keywords'),
            (r'(def)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'funcname'),
            (r'(class)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'classname'),
            (r'(from)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text), 'fromimport'),
            (r'(import)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text), 'import'),
            include('builtins'),
            include('backtick'),
            ('(?:[rR]|[uU][rR]|[rR][uU])"""', String, 'tdqs'),
            ("(?:[rR]|[uU][rR]|[rR][uU])'''", String, 'tsqs'),
            ('(?:[rR]|[uU][rR]|[rR][uU])"', String, 'dqs'),
            ("(?:[rR]|[uU][rR]|[rR][uU])'", String, 'sqs'),
            ('[uU]?"""', String, combined('stringescape', 'tdqs')),
            ("[uU]?'''", String, combined('stringescape', 'tsqs')),
            ('[uU]?"', String, combined('stringescape', 'dqs')),
            ("[uU]?'", String, combined('stringescape', 'sqs')),

Keyword),
            # start of function, class and module names
            (r'(module)(\s+)([a-zA-Z_]\w*'
             r'(?:::[a-zA-Z_]\w*)*)',
             bygroups(Keyword, Text, Name.Namespace)),
            (r'(def)(\s+)', bygroups(Keyword, Text), 'funcname'),
            (r'def(?=[*%&^`~+-/\[<>=])', Keyword, 'funcname'),
            (r'(class)(\s+)', bygroups(Keyword, Text), 'classname'),
            # special methods
            (words((
                'initialize', 'new', 'loop', 'include', 'extend', 'raise', 'attr_reader',
                'attr_writer', 'attr_accessor', 'attr', 'catch', 'throw', 'private',
                'module_function', 'public', 'protected', 'true', 'false', 'nil'),
                suffix=r'\b'),
             Keyword.Pseudo),
            (r'(not|and|or)\b', Operator.Word),
            (words((
                'autoload', 'block_given', 'const_defined', 'eql', 'equal', 'frozen', 'include',
                'instance_of', 'is_a', 'iterator', 'kind_of', 'method_defined', 'nil',
                'private_method_defined', 'protected_method_defined',
                'public_method_defined', 'respond_to', 'tainted'), suffix=r'\?'),
             Name.Builtin),
            (r'(chomp|chop|exit|gsub|sub)!', Name.Builtin),
            (words((
                'Array', 'Float', 'Integer', 'String', '__id__', '__send__', 'abort',
                'ancestors', 'at_exit', 'autoload', 'binding', 'callcc', 'caller',
                'catch', 'chomp', 'chop', 'class_eval', 'class_variables',
                'clone', 'const_defined?', 'const_get', 'const_missing', 'const_set',
                'constants', 'display', 'dup', 'eval', 'exec', 'exit', 'extend', 'fail', 'fork',
                'format', 'freeze', 'getc', 'gets', 'global_variables', 'gsub',
                'hash', 'id', 'included_modules', 'inspect', 'instance_eval',
                'instance_method', 'instance_methods',

"""

    background_color = "#f8f8f8"
    default_style = ""

    styles = {
        Whitespace:                "#bbbbbb",
        Comment:                   "italic #008800",
        Comment.Preproc:           "noitalic",
        Comment.Special:           "noitalic bold",

        Keyword:                   "bold #AA22FF",
        Keyword.Pseudo:            "nobold",
        Keyword.Type:              "bold #00BB00",

        Operator:                  "#666666",
        Operator.Word:             "bold #AA22FF",

        Name.Builtin:              "#AA22FF",
        Name.Function:             "#00A000",
        Name.Class:                "#0000FF",
        Name.Namespace:            "bold #0000FF",
        Name.Exception:            "bold #D2413A",
        Name.Variable:             "#B8860B",
        Name.Constant:             "#880000",
        Name.Label:                "#A0A000",
        Name.Entity:               "bold #999999",
        Name.Attribute:            "#BB4444",
        Name.Tag:                  "bold #008000",
        Name.Decorator:            "#AA22FF",

        String:                    "#BB4444",

# Lexemes:
            #  Identifiers
            (r'\bimport\b', Keyword.Reserved, 'import'),
            (r'\bmodule\b', Keyword.Reserved, 'module'),
            (r'\berror\b', Name.Exception),
            (r'\b(%s)(?!\')\b' % '|'.join(reserved), Keyword.Reserved),
            (r"'[^\\]'", String.Char),  # this has to come before the TH quote
            (r'^[_' + uni.Ll + r'][\w\']*', Name.Function),
            (r"'?[_" + uni.Ll + r"][\w']*", Name),
            (r"('')?[" + uni.Lu + r"][\w\']*", Keyword.Type),
            (r"(')[" + uni.Lu + r"][\w\']*", Keyword.Type),
            (r"(')\[[^\]]*\]", Keyword.Type),  # tuples and lists get special treatment in GHC
            (r"(')\([^)]*\)", Keyword.Type),  # ..
            #  Operators
            (r'\\(?![:!#$%&*+.\\/<=>?@^|~-]+)', Name.Function),  # lambda operator
            (r'(<-|::|->|=>|=)(?![:!#$%&*+.\\/<=>?@^|~-]+)', Operator.Word),  # specials
            (r':[:!#$%&*+.\\/<=>?@^|~-]*', Keyword.Type),  # Constructor operators
            (r'[:!#$%&*+.\\/<=>?@^|~-]+', Operator),  # Other operators
            #  Numbers
            (r'\d+[eE][+-]?\d+', Number.Float),
            (r'\d+\.\d+([eE][+-]?\d+)?', Number.Float),
            (r'0[oO][0-7]+', Number.Oct),
            (r'0[xX][\da-fA-F]+', Number.Hex),
            (r'\d+', Number.Integer),
            #  Character/String Literals
            (r"'", String.Char, 'character'),
            (r'"', String, 'string'),
            #  Special
            (r'\[\]', Keyword.Type),
            (r'\(\)', Name.Builtin),
            (r'[][(),;`{}]', Punctuation),
        ],

def get_tokens_unprocessed(self, text):
        # set . as Operator instead of Punctuation
        for index, token, value in LuaLexer.get_tokens_unprocessed(self, text):
            if token == Punctuation and value == ".":
                token = Operator
            yield index, token, value

(r'(?>=|<<|>>|:=|'
             r'<=|>=|<>|[-&*/\\^+=<>\[\]]',
             Operator),
            ('"', String, 'string'),
            (r'_\n', Text),  # Line continuation  (must be before Name)
            (uni_name + '[%&@!#$]?', Name),
            ('#.*?#', Literal.Date),
            (r'(\d+\.\d*|\d*\.\d+)(F[+-]?[0-9]+)?', Number.Float),
            (r'\d+([SILDFR]|US|UI|UL)?', Number.Integer),
            (r'&H[0-9a-f]+([SILDFR]|US|UI|UL)?', Number.Integer),
            (r'&O[0-7]+([SILDFR]|US|UI|UL)?', Number.Integer),
        ],
        'string': [
            (r'""', String),
            (r'"C?', String, '#pop'),
            (r'[^"]+', String),
        ],
        'dim': [
            (uni_name, Name.Variable, '#pop'),

'RealPart', 'Rename', 'Repeat', 'Reshape', 'RRSpacing', 'RShift',
                'Same_Type_As', 'Scale', 'Scan', 'Second', 'Selected_Char_Kind',
                'Selected_Int_Kind', 'Selected_Real_Kind', 'Set_Exponent', 'Shape',
                'ShiftA', 'ShiftL', 'ShiftR', 'Short', 'Sign', 'Signal', 'SinH',
                'Sin', 'Sleep', 'Sngl', 'Spacing', 'Spread', 'SqRt', 'SRand',
                'Stat', 'Storage_Size', 'Sum', 'SymLnk', 'System', 'System_Clock',
                'Tan', 'TanH', 'Time', 'This_Image', 'Tiny', 'TrailZ', 'Transfer',
                'Transpose', 'Trim', 'TtyNam', 'UBound', 'UCoBound', 'UMask',
                'Unlink', 'Unpack', 'Verify', 'XOr', 'ZAbs', 'ZCos', 'ZExp',
                'ZLog', 'ZSin', 'ZSqRt'), prefix=r'\b', suffix=r'\s*\b'),
             Name.Builtin),

            # Booleans
            (r'\.(true|false)\.', Name.Builtin),
            # Comparing Operators
            (r'\.(eq|ne|lt|le|gt|ge|not|and|or|eqv|neqv)\.', Operator.Word),
        ],

        'strings': [
            (r'(?s)"(\\\\|\\[0-7]+|\\.|[^"\\])*"', String.Double),
            (r"(?s)'(\\\\|\\[0-7]+|\\.|[^'\\])*'", String.Single),
        ],

        'nums': [
            (r'\d+(?![.e])(_[a-z]\w+)?', Number.Integer),
            (r'[+-]?\d*\.\d+([ed][-+]?\d+)?(_[a-z]\w+)?', Number.Float),
            (r'[+-]?\d+\.\d*([ed][-+]?\d+)?(_[a-z]\w+)?', Number.Float),
        ],
    }


class FortranFixedLexer(RegexLexer):

(r'"[^\n"]*"', String),  # double quoted string
        ],
        'operators': [
            # Arithmetic Operators
            (r'[+-]', Operator),
            (r'[*/]', Operator),
            # Relational Operators
            (r'[=#<>]', Operator),
            # Dereferencing Operator
            (r'\^', Operator),
            # Logical AND Operator
            (r'&', Operator),
            # Logical NOT Operator
            (r'~', Operator),
            # Assignment Symbol
            (r':=', Operator),
            # Range Constructor
            (r'\.\.', Operator),
            (r'\$', Operator),
        ],
        'identifiers': [
            (r'([a-zA-Z_$][\w$]*)', Name),
        ],
        'builtins': [
            (words((
                'ANYPTR', 'ANYREC', 'BOOLEAN', 'BYTE', 'CHAR', 'INTEGER', 'LONGINT',
                'REAL', 'SET', 'SHORTCHAR', 'SHORTINT', 'SHORTREAL'
                ), suffix=r'\b'), Keyword.Type),
            (words((
                'ABS', 'ABSTRACT', 'ARRAY', 'ASH', 'ASSERT', 'BEGIN', 'BITS', 'BY',
                'CAP', 'CASE', 'CHR', 'CLOSE', 'CONST', 'DEC', 'DIV', 'DO', 'ELSE',
                'ELSIF', 'EMPTY', 'END', 'ENTIER', 'EXCL', 'EXIT', 'EXTENSIBLE', 'FOR',

'SUPER', 'SYMBOL', 'SYSTEM-DEFAULT', 'TABLE', 'TERMINAL', 'TEXT',
                'TYPEDEF', 'UCS-4', 'UNIVERSAL', 'USER-DEFAULT', 'UTF-16', 'UTF-8',
                'VAL-STATUS', 'VALID', 'VALIDATE', 'VALIDATE-STATUS'),
                   prefix=r'(^|(?<=[^\w\-]))', suffix=r'\s*($|(?=[^\w\-]))'),
             Error),

            # Data Types
            (r'(^|(?<=[^\w\-]))'
             r'(PIC\s+.+?(?=(\s|\.\s))|PICTURE\s+.+?(?=(\s|\.\s))|'
             r'(COMPUTATIONAL)(-[1-5X])?|(COMP)(-[1-5X])?|'
             r'BINARY-C-LONG|'
             r'BINARY-CHAR|BINARY-DOUBLE|BINARY-LONG|BINARY-SHORT|'
             r'BINARY)\s*($|(?=[^\w\-]))', Keyword.Type),

            # Operators
            (r'(\*\*|\*|\+|-|/|<=|>=|<|>|==|/=|=)', Operator),

            # (r'(::)', Keyword.Declaration),

            (r'([(),;:&%.])', Punctuation),

            # Intrinsics
            (r'(^|(?<=[^\w\-]))(ABS|ACOS|ANNUITY|ASIN|ATAN|BYTE-LENGTH|'
             r'CHAR|COMBINED-DATETIME|CONCATENATE|COS|CURRENT-DATE|'
             r'DATE-OF-INTEGER|DATE-TO-YYYYMMDD|DAY-OF-INTEGER|DAY-TO-YYYYDDD|'
             r'EXCEPTION-(?:FILE|LOCATION|STATEMENT|STATUS)|EXP10|EXP|E|'
             r'FACTORIAL|FRACTION-PART|INTEGER-OF-(?:DATE|DAY|PART)|INTEGER|'
             r'LENGTH|LOCALE-(?:DATE|TIME(?:-FROM-SECONDS)?)|LOG(?:10)?|'
             r'LOWER-CASE|MAX|MEAN|MEDIAN|MIDRANGE|MIN|MOD|NUMVAL(?:-C)?|'
             r'ORD(?:-MAX|-MIN)?|PI|PRESENT-VALUE|RANDOM|RANGE|REM|REVERSE|'
             r'SECONDS-FROM-FORMATTED-TIME|SECONDS-PAST-MIDNIGHT|SIGN|SIN|SQRT|'
             r'STANDARD-DEVIATION|STORED-CHAR-LENGTH|SUBSTITUTE(?:-CASE)?|'