How to use the xlwings.main.Workbook.get_xl_workbook function in xlwings

Keyword Arguments
        -----------------
        wkb : Workbook object, default Workbook.current()
            Defaults to the Workbook that was instantiated last or set via ``Workbook.set_current()``.

        Examples
        --------
        >>> Sheet.all()
        [, ]
        >>> [i.name.lower() for i in Sheet.all()]
        ['sheet1', 'sheet2']
        >>> [i.autofit() for i in Sheet.all()]

        .. versionadded:: 0.2.3
        """
        xl_workbook = Workbook.get_xl_workbook(wkb)
        sheet_list = []
        for i in range(1, xlplatform.count_worksheets(xl_workbook) + 1):
            sheet_list.append(Sheet(i, wkb=wkb))

        return sheet_list

width : float, default None
            Width in points. If PIL/Pillow is installed, it defaults to the width of the picture.
            Otherwise it defaults to 100 points.

        height : float, default None
            Height in points. If PIL/Pillow is installed, it defaults to the height of the picture.
            Otherwise it defaults to 100 points.

        wkb : Workbook object, default Workbook.current()
            Defaults to the Workbook that was instantiated last or set via ``Workbook.set_current()``.


        .. versionadded:: 0.5.0
        """

        xl_workbook = Workbook.get_xl_workbook(wkb)

        if isinstance(sheet, Sheet):
                sheet = sheet.index
        if sheet is None:
            sheet = xlplatform.get_worksheet_index(xlplatform.get_active_sheet(xl_workbook))

        if name:
            if name in xlplatform.get_shapes_names(xl_workbook, sheet):
                raise ShapeAlreadyExists('A shape with this name already exists.')

        if sys.platform.startswith('darwin') and xlplatform.get_major_app_version_number(xl_workbook) >= 15:
            # Office 2016 for Mac is sandboxed. This path seems to work without the need of granting access explicitly
            xlwings_picture = os.path.expanduser("~") + '/Library/Containers/com.microsoft.Excel/Data/xlwings_picture.png'
            shutil.copy2(filename, xlwings_picture)
            filename = xlwings_picture

"""
        Counts the number of Sheets.

        Keyword Arguments
        -----------------
        wkb : Workbook object, default Workbook.current()
            Defaults to the Workbook that was instantiated last or set via ``Workbook.set_current()``.

        Examples
        --------
        >>> Sheet.count()
        3

        .. versionadded:: 0.2.3
        """
        xl_workbook = Workbook.get_xl_workbook(wkb)
        return xlplatform.count_worksheets(xl_workbook)

Returns
        -------
        Sheet object

        Examples
        --------

        >>> Sheet.add()  # Place at end with default name
        >>> Sheet.add('NewSheet', before='Sheet1')  # Include name and position
        >>> new_sheet = Sheet.add(after=3)
        >>> new_sheet.index
        4

        .. versionadded:: 0.2.3
        """
        xl_workbook = Workbook.get_xl_workbook(wkb)

        if before is None and after is None:
            after = Sheet(Sheet.count(wkb=wkb), wkb=wkb)
        elif before:
            before = Sheet(before, wkb=wkb)
        elif after:
            after = Sheet(after, wkb=wkb)

        if name:
            if name.lower() in [i.name.lower() for i in Sheet.all(wkb=wkb)]:
                raise Exception('That sheet name is already taken.')
            else:
                xl_sheet = xlplatform.add_sheet(xl_workbook, before, after)
                xlplatform.set_worksheet_name(xl_sheet, name)
                return cls(name, wkb)
        else:

def active(cls, wkb=None):
        """Returns the active Sheet. Use like so: ``Sheet.active()``"""
        xl_workbook = Workbook.get_xl_workbook(wkb)
        return cls(xlplatform.get_worksheet_name(xlplatform.get_active_sheet(xl_workbook)), wkb)

Keyword Arguments
        -----------------
        chart_type : xlwings.ChartType member, default xlColumnClustered
            Excel chart type. E.g. xlwings.ChartType.xlLine

        name : str, default None
            Excel chart name. Defaults to Excel standard name if not provided, e.g. 'Chart 1'

        source_data : Range
            e.g. Range('A1').table

        wkb : Workbook object, default Workbook.current()
            Defaults to the Workbook that was instantiated last or set via ``Workbook.set_current()``.
        """
        wkb = kwargs.get('wkb', None)
        xl_workbook = Workbook.get_xl_workbook(wkb)

        chart_type = kwargs.get('chart_type', ChartType.xlColumnClustered)
        name = kwargs.get('name')
        source_data = kwargs.get('source_data')

        if isinstance(sheet, Sheet):
                sheet = sheet.index
        if sheet is None:
            sheet = xlplatform.get_worksheet_index(xlplatform.get_active_sheet(xl_workbook))

        xl_chart = xlplatform.add_chart(xl_workbook, sheet, left, top, width, height)

        if name:
            xlplatform.set_chart_name(xl_chart, name)
        else:
            name = xlplatform.get_chart_name(xl_chart)

def __init__(self, *args, **kwargs):
        # Use current Workbook if none provided
        self.wkb = kwargs.get('wkb', None)
        self.xl_workbook = Workbook.get_xl_workbook(self.wkb)

        # Arguments
        if len(args) == 1:
            self.sheet_name_or_index = xlplatform.get_worksheet_name(xlplatform.get_active_sheet(self.xl_workbook))
            self.name_or_index = args[0]
        elif len(args) == 2:
            if isinstance(args[0], Sheet):
                self.sheet_name_or_index = args[0].index
            else:
                self.sheet_name_or_index = args[0]
            self.name_or_index = args[1]

        self.xl_shape = xlplatform.get_shape(self)
        self.name = xlplatform.get_shape_name(self)