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# ``twisted`.`web`.`template`.`slot``

class documentation

`class slot: (source)`

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Marker for markup insertion in a template.

Instance Variable | `children` | The `Tag` objects included in this `slot`'s template.
Instance Variable | `columnNumber` | The column number at which this tag was encountered in the XML file from which it was parsed.
Instance Variable | `default` | The default contents of this slot, if it is left unfilled.
Instance Variable | `filename` | The name of the XML file from which this tag was parsed.
Instance Variable | `lineNumber` | The line number on which this tag was encountered in the XML file from which it was parsed.
Instance Variable | `name` | The name of this slot.

children: `list[Tag]` = (source)

The `Tag` objects included in this `slot`'s template.

columnNumber: `int | None` = (source)

The column number at which this tag was encountered in the XML file from which it was parsed.

If it was not parsed from an XML file, `None`.

default: `Flattenable | None` = (source)

The default contents of this slot, if it is left unfilled.

If this is `None`, an `UnfilledSlot` will be raised, rather than `None` actually being used.

filename: `str | None` = (source)

The name of the XML file from which this tag was parsed.

If it was not parsed from an XML file, `None`.

lineNumber: `int | None` = (source)

The line number on which this tag was encountered in the XML file from which it was parsed.

If it was not parsed from an XML file, `None`.

name: `str` = (source)

The name of this slot.

The key which must be used in `Tag.fillSlots` to fill it.