Package nltk_lite :: Package parse :: Module tree

[frames] | no frames]

Module tree

Class for representing hierarchical language structures, such as syntax trees and morphological trees.

Classes

Tree
A hierarchical structure.

ImmutableTree

ProbabilisticTree

ImmutableProbabilisticTree

Functions

_child_names(tree)

source code

tree

bracket_parse(s)
Parse a treebank string and return a tree.

source code

tree

sinica_parse(s)
Parse a Sinica Treebank string and return a tree.

source code

demo()
A demonstration showing how Trees and Trees can be used. source code

Function Details

bracket_parse(s)

Parse a treebank string and return a tree. Trees are represented as nested brackettings, e.g. (S (NP (NNP John)) (VP (V runs))).

Parameters:

s (string) - The string to be converted

Returns: tree

A tree corresponding to the string representation.

sinica_parse(s)

Parse a Sinica Treebank string and return a tree. Trees are represented as nested brackettings, as shown in the following example (X represents a Chinese character): S(goal:NP(Head:Nep:XX)|theme:NP(Head:Nhaa:X)|quantity:Dab:X|Head:VL2:X)#0(PERIODCATEGORY)

Parameters:

s (string) - The string to be converted

Returns: tree

A tree corresponding to the string representation.

demo()

A demonstration showing how Trees and Trees can be used. This demonstration creates a Tree, and loads a Tree from the treebank corpus, and shows the results of calling several of their methods.