'Constructor.'

def __init__(self):

    super(Worksheet, self).__init__()
    self.name = None
    self.index = None
    self.str_table = None
    self.palette = None
    self.constant_memory = 0
    self.tmpdir = None
    self.is_chartsheet = False
    self.ext_sheets = []
    self.fileclosed = 0
    self.excel_version = 2007
    self.excel2003_style = False
    self.xls_rowmax = 1048576
    self.xls_colmax = 16384
    self.xls_strmax = 32767
    self.dim_rowmin = None
    self.dim_rowmax = None
    self.dim_colmin = None
    self.dim_colmax = None
    self.colinfo = {}
    self.selections = []
    self.hidden = 0
    self.active = 0
    self.tab_color = 0
    self.panes = []
    self.active_pane = 3
    self.selected = 0
    self.page_setup_changed = False
    self.paper_size = 0
    self.orientation = 1
    self.print_options_changed = False
    self.hcenter = 0
    self.vcenter = 0
    self.print_gridlines = 0
    self.screen_gridlines = 1
    self.print_headers = 0
    self.header_footer_changed = False
    self.header = ''
    self.footer = ''
    self.header_footer_aligns = True
    self.header_footer_scales = True
    self.header_images = []
    self.footer_images = []
    self.header_images_list = []
    self.margin_left = 0.7
    self.margin_right = 0.7
    self.margin_top = 0.75
    self.margin_bottom = 0.75
    self.margin_header = 0.3
    self.margin_footer = 0.3
    self.repeat_row_range = ''
    self.repeat_col_range = ''
    self.print_area_range = ''
    self.page_order = 0
    self.black_white = 0
    self.draft_quality = 0
    self.print_comments = 0
    self.page_start = 0
    self.fit_page = 0
    self.fit_width = 0
    self.fit_height = 0
    self.hbreaks = []
    self.vbreaks = []
    self.protect_options = {}
    self.set_cols = {}
    self.set_rows = defaultdict(dict)
    self.zoom = 100
    self.zoom_scale_normal = 1
    self.print_scale = 100
    self.is_right_to_left = 0
    self.show_zeros = 1
    self.leading_zeros = 0
    self.outline_row_level = 0
    self.outline_col_level = 0
    self.outline_style = 0
    self.outline_below = 1
    self.outline_right = 1
    self.outline_on = 1
    self.outline_changed = False
    self.original_row_height = 15
    self.default_row_height = 15
    self.default_row_pixels = 20
    self.default_col_pixels = 64
    self.default_row_zeroed = 0
    self.names = {}
    self.write_match = []
    self.table = defaultdict(dict)
    self.merge = []
    self.row_spans = {}
    self.has_vml = False
    self.has_header_vml = False
    self.has_comments = False
    self.comments = defaultdict(dict)
    self.comments_list = []
    self.comments_author = ''
    self.comments_visible = 0
    self.vml_shape_id = 1024
    self.buttons_list = []
    self.vml_header_id = 0
    self.autofilter_area = ''
    self.autofilter_ref = None
    self.filter_range = []
    self.filter_on = 0
    self.filter_range = []
    self.filter_cols = {}
    self.filter_type = {}
    self.col_sizes = {}
    self.row_sizes = {}
    self.col_formats = {}
    self.col_size_changed = False
    self.row_size_changed = False
    self.last_shape_id = 1
    self.rel_count = 0
    self.hlink_count = 0
    self.hlink_refs = []
    self.external_hyper_links = []
    self.external_drawing_links = []
    self.external_comment_links = []
    self.external_vml_links = []
    self.external_table_links = []
    self.drawing_links = []
    self.vml_drawing_links = []
    self.charts = []
    self.images = []
    self.tables = []
    self.sparklines = []
    self.shapes = []
    self.shape_hash = {}
    self.drawing = 0
    self.rstring = ''
    self.previous_row = 0
    self.validations = []
    self.cond_formats = {}
    self.dxf_priority = 1
    self.is_chartsheet = 0
    self.page_view = 0
    self.vba_codename = None
    self.date_1904 = False
    self.hyperlinks = defaultdict(dict)
    self.strings_to_numbers = False
    self.strings_to_urls = True
    self.nan_inf_to_errors = False
    self.strings_to_formulas = True
    self.default_date_format = None
    self.default_url_format = None
    self.remove_timezone = False
    self.row_data_filename = None
    self.row_data_fh = None
    self.worksheet_meta = None
    self.vml_data_id = None
    self.vml_shape_id = None
    self.row_data_filename = None
    self.row_data_fh = None
    self.row_data_fh_closed = False
    self.vertical_dpi = 0
    self.horizontal_dpi = 0
