SequenceField(self, /, *args, **kwargs)
SequenceField represents a sequence of things. This class just adds a method onto
sequence_length. It exists so that
IndexField and other
Fields can have a single type to require, with a consistent API, whether they are
pointing to words in a
TextField, items in a
ListField, or something else.
SequenceField.sequence_length(self) -> int
How many elements are there in this sequence?