nltk.ccg.chart.BackwardTypeRaiseRule

class documentation

class BackwardTypeRaiseRule(AbstractChartRule): (source)

Class for applying backward type raising.

Method	`__init__`	Undocumented
Method	`__str__`	Undocumented
Method	`apply`	Return a generator that will add edges licensed by this rule and the given edges to the chart, one at a time. Each time the generator is resumed, it will either add a new edge and yield that edge; or return.
Constant	`NUMEDGES`	Undocumented
Instance Variable	`_combinator`	Undocumented

Inherited from AbstractChartRule:

Method apply_everywhere Return a generator that will add all edges licensed by this rule, given the edges that are currently in the chart, one at a time. Each time the generator is resumed, it will either add a new edge and yield that edge; or return.

Inherited from ChartRuleI (via AbstractChartRule):

Class Variable NUM_EDGES The number of existing edges that this rule uses to license new edges. Typically, this number ranges from zero to two.

def __init__(self): (source) ¶

Undocumented

def __str__(self): (source) ¶

overrides nltk.parse.chart.AbstractChartRule.__str__

Undocumented

def apply(self, chart, grammar, left_edge, right_edge): (source) ¶

overrides nltk.parse.chart.AbstractChartRule.apply

Return a generator that will add edges licensed by this rule and the given edges to the chart, one at a time. Each time the generator is resumed, it will either add a new edge and yield that edge; or return.

Parameters
chart	Undocumented
grammar	Undocumented
left_edge	Undocumented
right_edge	Undocumented
*edges:list(EdgeI)	A set of existing edges. The number of edges that should be passed to `apply()` is specified by the `NUM_EDGES` class variable.
Returns
iter(EdgeI)	Undocumented

NUMEDGES: int = (source) ¶

Undocumented

Value

_combinator = (source) ¶

Undocumented