Package nltk :: Package parse :: Module projectivedependencyparser :: Class DependencySpan

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type DependencySpan

object --+
         |
        DependencySpan

A contiguous span over some part of the input string representing dependency (head -> modifier) relationships amongst words. An atomic span corresponds to only one word so it isn't a 'span' in the conventional sense, as its _start_index = _end_index = _head_index for concatenation purposes. All other spans are assumed to have arcs between all nodes within the start and end indexes of the span, and one head index corresponding to the head word for the entire span. This is the same as the root node if the dependency structure were depicted as a graph.

Instance Methods

__init__(self, start_index, end_index, head_index, arcs, tags)

source code

int.

head_index(self)
Returns: An value indexing the head of the entire DependencySpan. source code

string.

__repr__(self)
Returns: A concise string representatino of the DependencySpan. source code

string.

__str__(self)
Returns: A verbose string representation of the DependencySpan. source code

boolean.

__eq__(self, other)
Returns: true if this DependencySpan is equal to other. source code

boolean

__ne__(self, other)
Returns: false if this DependencySpan is equal to other source code

int

__cmp__(self, other)
Returns: -1 if args are of different class.

source code

__hash__(self)
Returns: The hash value of this DependencySpan. source code

Method Details

init(self, start_index, end_index, head_index, arcs, tags)
(Constructor)

Overrides: object.__init__: (inherited documentation)

head_index(self)

Returns: int.: An value indexing the head of the entire DependencySpan.

repr(self)
(Representation operator)

Returns: string.: A concise string representatino of the DependencySpan.
Overrides: object.__repr__

str(self)
(Informal representation operator)

Returns: string.: A verbose string representation of the DependencySpan.
Overrides: object.__str__

eq(self, other)
(Equality operator)

Returns: boolean.: true if this DependencySpan is equal to other.

ne(self, other)

Returns: boolean: false if this DependencySpan is equal to other

cmp(self, other)
(Comparison operator)

Returns: int: -1 if args are of different class. Otherwise returns the cmp() of the two sets of spans.

hash(self)
(Hashing function)

Returns:: The hash value of this DependencySpan.
Overrides: object.__hash__