How to use the rope.base.worder.Worder function in rope

def __init__(self, call, implicit_arg, is_lambda=False):
        self.call = call
        self.implicit_arg = implicit_arg
        self.word_finder = worder.Worder(self.call)
        if is_lambda:
            self.last_parens = self.call.rindex(':')
        else:
            self.last_parens = self.call.rindex(')')
        self.first_parens = self.word_finder._find_parens_start(
            self.last_parens)

def _keyword_parameters(self, pymodule, scope):
        offset = self.offset
        if offset == 0:
            return {}
        word_finder = worder.Worder(self.code, True)
        lines = SourceLinesAdapter(self.code)
        lineno = lines.get_line_number(offset)
        if word_finder.is_on_function_call_keyword(offset - 1):
            name_finder = rope.base.evaluate.ScopeNameFinder(pymodule)
            function_parens = word_finder.\
                find_parens_start_from_inside(offset - 1)
            primary = word_finder.get_primary_at(function_parens - 1)
            try:
                function_pyname = rope.base.evaluate.\
                    eval_str(scope, primary)
            except exceptions.BadIdentifierError, e:
                return {}
            if function_pyname is not None:
                pyobject = function_pyname.get_object()
                if isinstance(pyobject, pyobjects.AbstractFunction):
                    pass

def word_finder(self):
        return worder.Worder(self.source_code, self.docs)

def get_changed_module(self):
        word_finder = worder.Worder(self.source)
        change_collector = codeanalyze.ChangeCollector(self.source)
        for occurrence in self.occurrence_finder.find_occurrences(
                self.resource):
            if not occurrence.is_called() and not occurrence.is_defined():
                continue
            start, end = occurrence.get_primary_range()
            begin_parens, end_parens = word_finder.\
                get_word_parens_range(end - 1)
            if occurrence.is_called():
                primary, pyname = occurrence.get_primary_and_pyname()
                changed_call = self.call_changer.change_call(
                    primary, pyname, self.source[start:end_parens])
            else:
                changed_call = self.call_changer.change_definition(
                    self.source[start:end_parens])
            if changed_call is not None:

def _keyword_parameters(self, pymodule, scope):
        offset = self.offset
        if offset == 0:
            return {}
        word_finder = worder.Worder(self.code, True)
        lines = SourceLinesAdapter(self.code)
        lineno = lines.get_line_number(offset)
        if word_finder.is_on_function_call_keyword(offset - 1):
            name_finder = rope.base.evaluate.ScopeNameFinder(pymodule)
            function_parens = word_finder.\
                find_parens_start_from_inside(offset - 1)
            primary = word_finder.get_primary_at(function_parens - 1)
            try:
                function_pyname = rope.base.evaluate.\
                    eval_str(scope, primary)
            except exceptions.BadIdentifierError, e:
                return {}
            if function_pyname is not None:
                pyobject = function_pyname.get_object()
                if isinstance(pyobject, pyobjects.AbstractFunction):
                    pass

def _keyword_parameters(self, pymodule, scope):
        offset = self.offset
        if offset == 0:
            return {}
        word_finder = worder.Worder(self.code, True)
        if word_finder.is_on_function_call_keyword(offset - 1):
            function_parens = word_finder.\
                find_parens_start_from_inside(offset - 1)
            primary = word_finder.get_primary_at(function_parens - 1)
            try:
                function_pyname = rope.base.evaluate.\
                    eval_str(scope, primary)
            except exceptions.BadIdentifierError:
                return {}
            if function_pyname is not None:
                pyobject = function_pyname.get_object()
                if isinstance(pyobject, pyobjects.AbstractFunction):
                    pass
                elif isinstance(pyobject, pyobjects.AbstractClass) and \
                        '__init__' in pyobject:
                    pyobject = pyobject['__init__'].get_object()

def get_name_at(resource, offset):
    source_code = resource.read()
    word_finder = Worder(source_code)
    return word_finder.get_word_at(offset)

def read(pyfunction):
        pymodule = pyfunction.get_module()
        word_finder = worder.Worder(pymodule.source_code)
        lineno = pyfunction.get_ast().lineno
        start = pymodule.lines.get_line_start(lineno)
        call = word_finder.get_function_and_args_in_header(start)
        return DefinitionInfo._read(pyfunction, call)

def find_definition(project, code, offset, resource=None, maxfixes=1):
    """Return the definition location of the python name at `offset`

    A `Location` object is returned if the definition location can be
    determined, otherwise ``None`` is returned.
    """
    fixer = fixsyntax.FixSyntax(project.pycore, code, resource, maxfixes)
    main_module = fixer.get_pymodule()
    pyname = fixer.pyname_at(offset)
    if pyname is not None:
        module, lineno = pyname.get_definition_location()
        name = rope.base.worder.Worder(code).get_word_at(offset)
        if lineno is not None:
            start = module.lines.get_line_start(lineno)
            def check_offset(occurrence):
                if occurrence.offset < start:
                    return False
            pyname_filter = occurrences.PyNameFilter(pyname)
            finder = occurrences.Finder(project.pycore, name,
                                        [check_offset, pyname_filter])
            for occurrence in finder.find_occurrences(pymodule=module):
                return Location(occurrence)