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# betty.config.collections.sequence module

Define and provide sequences of `betty.config.Configuration` instances.

class betty.config.collections.sequence.ConfigurationSequence

  Bases: `ConfigurationCollection`[`int`, `_ConfigurationT`], `Generic`[`_ConfigurationT`]

  A sequence of configuration values.

  __init__(configurations: Iterable[_ConfigurationT] | None = None)
  append(*configurations: _ConfigurationT) → None

    Append the given values to the end of the sequence.

  dump() → bool | int | float | str | None | MutableSequence[bool | int | float | str | None | MutableSequence[Dump] | MutableMapping[str, Dump]] | MutableMapping[str, bool | int | float | str | None | MutableSequence[Dump] | MutableMapping[str, Dump]] | type[Void]

    Dump this instance to a portable format.

  insert(index: int, *configurations: _ConfigurationT) → None

    Insert the given values at the given index.

  keys() → Iterator[int]

    Get all keys in this collection.

  load(dump: bool | int | float | str | None | MutableSequence[Dump] | MutableMapping[str, Dump]) → None

    Load dumped configuration.

    Raises:

      betty.assertion.error.AssertionFailed – Raised if the dump contains invalid configuration.

  move_to_beginning(*configuration_keys: int) → None

    Move the given keys (and their values) to the beginning of the sequence.

  move_to_end(*configuration_keys: int) → None

    Move the given keys (and their values) to the end of the sequence.

  move_towards_beginning(*configuration_keys: int) → None

    Move the given keys (and their values) one place towards the beginning of the sequence.

  move_towards_end(*configuration_keys: int) → None

    Move the given keys (and their values) one place towards the end of the sequence.

  prepend(*configurations: _ConfigurationT) → None

    Prepend the given values to the beginning of the sequence.

  replace(*configurations: _ConfigurationT) → None

    Replace any existing values with the given ones.

  to_index(configuration_key: int) → int

    Get the index for the given key.

  to_key(index: int) → int

    Get the key for the item at the given index.

  update(other: Self) → None

    Update this configuration with the values from `other`.

  values() → Iterator[_ConfigurationT]

    Get all values in this collection.