nltk.parse.featurechart.FeatureChartParser

class documentation

class FeatureChartParser(ChartParser): (source)

Known subclasses: nltk.parse.earleychart.FeatureIncrementalChartParser, nltk.parse.featurechart.FeatureBottomUpChartParser, nltk.parse.featurechart.FeatureBottomUpLeftCornerChartParser, nltk.parse.featurechart.FeatureTopDownChartParser

Constructor: FeatureChartParser(grammar, strategy, trace_chart_width, chart_class, **parser_args)

View In Hierarchy

Undocumented

Method __init__ Create a new chart parser, that uses grammar to parse texts.

Inherited from ChartParser:

Method	`chart_parse`	Return the final parse `Chart` from which all possible parse trees can be extracted.
Method	`grammar`	No summary
Method	`parse`	When possible this list is sorted from most likely to least likely.
Method	`_trace_new_edges`	Undocumented
Instance Variable	`_axioms`	Undocumented
Instance Variable	`_chart_class`	Undocumented
Instance Variable	`_grammar`	Undocumented
Instance Variable	`_inference_rules`	Undocumented
Instance Variable	`_strategy`	Undocumented
Instance Variable	`_trace`	Undocumented
Instance Variable	`_trace_chart_width`	Undocumented
Instance Variable	`_use_agenda`	Undocumented

Inherited from ParserI (via ChartParser):

Method	`parse_all`	No summary
Method	`parse_one`	No summary
Method	`parse_sents`	Apply `self.parse()` to each element of `sents`. :rtype: iter(iter(Tree))

def __init__(self, grammar, strategy=BU_LC_FEATURE_STRATEGY, trace_chart_width=20, chart_class=FeatureChart, **parser_args): (source) ¶

overrides nltk.parse.chart.ChartParser.__init__

overridden in nltk.parse.earleychart.FeatureIncrementalChartParser, nltk.parse.featurechart.FeatureBottomUpChartParser, nltk.parse.featurechart.FeatureBottomUpLeftCornerChartParser, nltk.parse.featurechart.FeatureTopDownChartParser

Create a new chart parser, that uses grammar to parse texts.

Parameters
grammar:CFG	The grammar used to parse texts.
strategy:list(ChartRuleI)	A list of rules that should be used to decide what edges to add to the chart (top-down strategy by default).
trace_chart_width:int	The default total width reserved for the chart in trace output. The remainder of each line will be used to display edges.
chart_class	The class that should be used to create the parse charts.
trace:int	The level of tracing that should be used when parsing a text. `0` will generate no tracing output; and higher numbers will produce more verbose tracing output.
use_agenda:bool	Use an optimized agenda-based algorithm, if possible.
**parser_args	Undocumented