def get_cell_value(worksheet, cell):
    """
    Gets the value of a specific cell of the current worksheet.

    :param worksheet: Current worksheet to manipulate.
    :param cell: A string or a tuple which denotes the cell to access.
    :return: The value of a specific cell of the current worksheet.
    """
    if type(cell) is tuple:
        r, c = cell
        return worksheet.cell(row=r, column=c).value
    else:
        return worksheet[cell].value
    pass