Package nltk :: Package corpus :: Package reader :: Module util :: Class ConcatenatedCorpusView

type ConcatenatedCorpusView

               object --+    
                        |    
util.AbstractLazySequence --+
                            |
                           ConcatenatedCorpusView

A 'view' of a corpus file that joins together one or more StreamBackedCorpusViews. At most one file handle is left open at any time.

Instance Methods

[hide private]

__init__(self, corpus_views)

source code

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

source code

close(self)

source code

iterate_from(self, start_tok)
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 util.AbstractLazySequence: __add__, __cmp__, __contains__, __getitem__, __hash__, __iter__, __mul__, __radd__, __repr__, __rmul__, count, index

Class Variables

[hide private]

Inherited from util.AbstractLazySequence (private): _MAX_REPR_SIZE

Instance Variables

[hide private]

_pieces
A list of the corpus subviews that make up this concatenation.

_offsets
A list of offsets, indicating the index at which each subview begins.

_open_piece
The most recently accessed corpus subview (or None).

Method Details

[hide private]

init(self, corpus_views)
(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: util.AbstractLazySequence.__len__: (inherited documentation)

iterate_from(self, start_tok)

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: util.AbstractLazySequence.iterate_from: (inherited documentation)

Instance Variable Details

[hide private]

_offsets

A list of offsets, indicating the index at which each subview begins. In particular:

   offsets[i] = sum([len(p) for p in pieces[:i]])

_open_piece

The most recently accessed corpus subview (or None). Before a new subview is accessed, this subview will be closed.

type ConcatenatedCorpusView

__init__(self, corpus_views) (Constructor)

__len__(self) (Length operator)

iterate_from(self, start_tok)

_offsets

_open_piece

init(self, corpus_views)
(Constructor)

len(self)
(Length operator)