nltk.grammar.FeatStructNonterminal

Method	__hash__	If this feature structure is frozen, return its hash value; otherwise, raise TypeError.
Method	symbol	Return the node value corresponding to this Nonterminal.

Inherited from FeatDict:

Method	__contains__	Return true if a feature with the given name or path exists.
Method	__deepcopy__	Undocumented
Method	__delitem__	If the feature with the given name or path exists, delete its value; otherwise, raise KeyError.
Method	__getitem__	If the feature with the given name or path exists, return its value; otherwise, raise KeyError.
Method	__init__	Create a new feature dictionary, with the specified features.
Method	__setitem__	Set the value for the feature with the given name or path to value. If name_or_path is an invalid path, raise KeyError.
Method	__str__	Display a multi-line representation of this feature dictionary as an FVM (feature value matrix).
Method	get	If the feature with the given name or path exists, return its value; otherwise, return default.
Method	has_key	Return true if a feature with the given name or path exists.
Method	update	Undocumented
Class Variable	clear	Undocumented
Class Variable	pop	Undocumented
Class Variable	popitem	Undocumented
Class Variable	setdefault	Undocumented
Method	_items	Return an iterable of (fid,fval) pairs, where fid is a feature identifier and fval is the corresponding feature value, for all features defined by this FeatStruct.
Method	_keys	Return an iterable of the feature identifiers used by this FeatStruct.
Method	_repr	Return a string representation of this feature structure.
Method	_str	No summary
Method	_values	Return an iterable of the feature values directly defined by this FeatStruct.
Constant	_INDEX_ERROR	Undocumented

Inherited from FeatStruct (via FeatDict):

Method	__eq__	Return true if self and other are both feature structures, assign the same values to all features, and contain the same reentrances. I.e., return self.equal_values(other, check_reentrance=True).
Method	__lt__	Undocumented
Method	__ne__	Undocumented
Method	__new__	Construct and return a new feature structure. If this constructor is called directly, then the returned feature structure will be an instance of either the FeatDict class or the FeatList class.
Method	__repr__	Display a single-line representation of this feature structure, suitable for embedding in other representations.
Method	copy	Return a new copy of self. The new copy will not be frozen.
Method	cyclic	Return True if this feature structure contains itself.
Method	equal_values	Return True if self and other assign the same value to to every feature. In particular, return true if self[p]==other[p] for every feature path p such that self[p] or other[p] is a base value (i.e., not a nested feature structure).
Method	freeze	Make this feature structure, and any feature structures it contains, immutable. Note: this method does not attempt to 'freeze' any feature value that is not a FeatStruct; it is recommended that you use only immutable feature values.
Method	frozen	Return True if this feature structure is immutable. Feature structures can be made immutable with the freeze() method. Immutable feature structures may not be made mutable again, but new mutable copies can be produced with the ...
Method	remove_variables	Return the feature structure that is obtained by deleting any feature whose value is a Variable.
Method	rename_variables	No summary
Method	retract_bindings	No summary
Method	substitute_bindings	No summary
Method	subsumes	Return True if self subsumes other. I.e., return true If unifying self with other would result in a feature structure equal to other.
Method	unify	Undocumented
Method	variables	No summary
Method	walk	Return an iterator that generates this feature structure, and each feature structure it contains. Each feature structure will be generated exactly once.
Method	_calculate_hashvalue	Return a hash value for this feature structure.
Method	_equal	Return True iff self and other have equal values.
Method	_find_reentrances	Return a dictionary that maps from the id of each feature structure contained in self (including self) to a boolean value, indicating whether it is reentrant or not.
Method	_freeze	Make this feature structure, and any feature structure it contains, immutable.
Method	_walk	Undocumented
Constant	_FROZEN_ERROR	Undocumented
Instance Variable	_frozen	frozen or not. Once this flag is set, it should never be un-set; and no further modification should be made to this feature structue.
Instance Variable	_hash	Undocumented

Inherited from Nonterminal (via FeatDict, FeatStruct, SubstituteBindingsI):

Method	__div__	Return a new nonterminal whose symbol is A/B, where A is the symbol for this nonterminal, and B is the symbol for rhs.
Method	__truediv__	Return a new nonterminal whose symbol is A/B, where A is the symbol for this nonterminal, and B is the symbol for rhs. This function allows use of the slash / operator with the future import of division.
Instance Variable	_symbol	The node value corresponding to this Nonterminal. This value must be immutable and hashable.