def _morphy(form, pos=NOUN):
pos = normalizePOS(pos)
section = {NOUN: NOUN, VERB: VERB, ADJECTIVE: ADJECTIVE, ADVERB: ADVERB}[pos]
excfile = open(nltk.data.find('corpora/wordnet/%s.exc' % section))
substitutions = MORPHOLOGICAL_SUBSTITUTIONS[pos]
dictionary=dictionaryFor(pos)
collection=[]
def trySubstitutions(form, # reduced form
substitutions): # remaining substitutions
if dictionary.has_key(form):
yield form
for n,(old,new) in enumerate(substitutions):
if form.endswith(old):
new_form = form[:-len(old)] + new
for f in trySubstitutions(new_form, substitutions[:n] +
substitutions[n+1:]):
yield f
exceptions = binarySearchFile(excfile, form)
if exceptions:
forms = exceptions[exceptions.find(' ')+1:-1].split()
for f in forms:
yield f
if pos == NOUN and form.endswith('ful'):
suffix = 'ful'
form = form[:-3]
else:
suffix = ''
for f in trySubstitutions(form, substitutions):
yield f + suffix
def trySubstitutions(form, substitutions, lookup=True, dictionary=dictionaryFor(pos)):
if lookup and form in dictionary:
return dictionary[form]
elif substitutions:
(old, new) = substitutions[0]
substitute = string.replace(form, old, new) and substitute != form
if substitute and substitute in dictionary:
return dictionary[substitute]
return trySubstitutions(form, substitutions[1:], lookup=False) or \
(substitute and trySubstitutions(substitute, substitutions[1:]))
def trySubstitutions(form,
substitutions,
lookup=True,
dictionary=dictionaryFor(pos)):
if lookup and form in dictionary:
return dictionary[form]
elif substitutions:
(old, new) = substitutions[0]
substitute = string.replace(form, old, new) and substitute != form
if substitute and substitute in dictionary:
return dictionary[substitute]
return trySubstitutions(form, substitutions[1:], lookup=False) or \
(substitute and trySubstitutions(substitute, substitutions[1:]))
