Package nltk :: Module util :: Class LazyConcatenation

type LazyConcatenation

          object --+    
                   |    
AbstractLazySequence --+
                       |
                      LazyConcatenation

A lazy sequence formed by concatenating a list of lists. This underlying list of lists may itself be lazy. LazyConcatenation maintains an index that it uses to keep track of the relationship between offsets in the concatenated lists and offsets in the sublists.

Instance Methods

[hide private]

__init__(self, list_of_lists)

source code

__len__(self)
Return the number of tokens in the corpus file underlying this corpus view.

source code

iterate_from(self, start_index)
Return an iterator that generates the tokens in the corpus file underlying this corpus view, starting at the token number start. source code

Inherited from AbstractLazySequence: __add__, __cmp__, __contains__, __getitem__, __hash__, __iter__, __mul__, __radd__, __repr__, __rmul__, count, index

Class Variables

[hide private]

Inherited from AbstractLazySequence (private): _MAX_REPR_SIZE

Method Details

[hide private]

init(self, list_of_lists)
(Constructor)

source code

Overrides: object.__init__: (inherited documentation)

len(self)
(Length operator)

source code

Return the number of tokens in the corpus file underlying this corpus view.

Overrides: AbstractLazySequence.__len__: (inherited documentation)

iterate_from(self, start_index)

source code

Return an iterator that generates the tokens in the corpus file underlying this corpus view, starting at the token number start. If start>=len(self), then this iterator will generate no tokens.

Overrides: AbstractLazySequence.iterate_from: (inherited documentation)

type LazyConcatenation

__init__(self, list_of_lists) (Constructor)

__len__(self) (Length operator)

iterate_from(self, start_index)

init(self, list_of_lists)
(Constructor)

len(self)
(Length operator)