Module tree

source code

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

Classes

[hide private]

ProbabilisticMixIn
A mix-in class to associate probabilities with other classes (trees, rules, etc.).

Tree
A hierarchical structure.

ImmutableTree

AbstractParentedTree
An abstract base class for Trees that automatically maintain pointers to their parents.

ParentedTree
A Tree that automatically maintains parent pointers for single-parented trees.

MultiParentedTree
A Tree that automatically maintains parent pointers for multi-parented trees.

ImmutableParentedTree

ImmutableMultiParentedTree

ProbabilisticTree

ImmutableProbabilisticTree

Functions

[hide private]

_child_names(tree)

source code

bracket_parse(s)
Use Tree.parse(s, remove_top_empty_bracketing=True) instead.

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

[hide private]

sinica_parse(s)

source code

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()

source code

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.