Ensure 'All Trading Days' and weekday checkboxes are mutually exclusive: uncheck All when any weekday selected; recheck All when no weekdays are selected.
Textual - Creating a Custom Checkbox - Mouse Vs Python
Textual's checkbox widget creates Boolean GUI elements in terminal interfaces, returning True when checked and False when unchecked, with customizable appearance and event handling capabilities.
When DataTables 'columns' is defined, row data becomes objects; access fields by property names (e.g., data.info1 or data['info1']) instead of numeric indices.