def map_headers(wb_obj):
    """
    Returns a nested dictionary with the location and name of each
    column header
    """
    sheets = wb_obj.sheetnames
    return_value = {}
    ignore_this = ["Main", "Commands", "Settings", "Errors"]
    for sheet in sheets:
        if sheet not in ignore_this:
            row = wb_obj[sheet][1]
            sheet_mapper = {}
            for count, cell in enumerate(row):
                sheet_mapper[cell.value] = count + 1
            return_value[sheet] = sheet_mapper
    return return_value