def __init__( self, nat_class_set, start, states, parameters, precision=None, m=None, e=None ): '''See: param_wfsa.ParametrizedWFSA arcs: dict(start state -> dict(natural class -> pair(destination state, parameter number) ) ) nat_class_set: A NaturalClassSet, which contains all the natural classes in the language, plus the alphabet, plus information useful for determining machine complexity. ''' self.nat_class_set = nat_class_set self.alphabet = nat_class_set.alphabet self.complexity = 0 ParametrizedWFSA.__init__( self, self.alphabet, start, states, parameters, 0, precision, m, e ) self.complexity = self._complex()
def __init__(self, alphabet, start, stops, arcs, categories, parameters, precision=None, m=None, e=None):
"""arcs: a dictionary from states to dictionaries
from letters or frozen sets of categories to
state, weight tuples. The categories on an arc
label are intersected to get the set of letters
that may traverse that arc.
categories: a dictionary from categories to the set
of phones belonging to that category.
"""
# self.categories[symbol] = set of phonemes
self.categories = {}
for cat, phones in categories.items():
self.categories[cat] = set(phones)
alphabet = set(alphabet)
# convert CatWFSA into an ordinary ParametrizedWFSA
self.cat_arcs = arcs
new_arcs = {}
for state, v in arcs.items():
new_arcs[state] = {}
for label, val in v.items():
if isinstance(label, frozenset):
phones = alphabet
for cat in label:
phones = phones.intersection(self.categories[cat])
for phone in phones:
if phone in new_arcs[state].keys():
# do error checking
dest0, w0 = new_arcs[state][phone]
dest1, w1 = val
if dest0 != dest1 or w0 != w1:
raise ArcCategoryError(state, phone, dest0, dest1, w0, w1)
else:
new_arcs[state][phone] = val
else:
if label in new_arcs[state].keys():
# do error checking
dest0, w0 = self.arcs[state][label]
dest1, w1 = val
if dest0 != dest1 or w0 != w1:
raise ArcCategoryError(state, label, dest0, dest1, w0, w1)
else:
new_arcs[state][label] = val
self.complexity = 1
ParametrizedWFSA.__init__(self, alphabet, start, stops, new_arcs, parameters)
self.complexity = self._complex()