Python 为什么可以'；当请求语法集时，我将wn.ADJ_作为pos传递

我知道wordnet有一个。我知道它在nltk中的synset类型enum中

from nltk.corpus import wordnet as wn
wn.ADJ_SAT
u's'

为什么我不能将它作为密钥传递给synset

>>> wn.synsets('dog', wn.ADJ_SAT)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/nltk/corpus/reader/wordnet.py", line 1413, in synsets
    for form in self._morphy(lemma, p)
  File "/Library/Python/2.7/site-packages/nltk/corpus/reader/wordnet.py", line 1627, in _morphy
    substitutions = self.MORPHOLOGICAL_SUBSTITUTIONS[pos]
KeyError: u's'

>>wn.synsets（'dog'，wn.ADJ_-SAT）
回溯（最近一次呼叫最后一次）：
文件“”，第1行，在
文件“/Library/Python/2.7/site packages/nltk/corpus/reader/wordnet.py”，第1413行，在synset中
对于自形（引理，p）
文件“/Library/Python/2.7/site packages/nltk/corpus/reader/wordnet.py”，第1627行，在
替换=自身。形态替换[pos]
关键错误：u's'

来自：

>>> from nltk.corpus import wordnet as wn
>>> wn.synsets('able')
[Synset('able.a.01'), Synset('able.s.02'), Synset('able.s.03'), Synset('able.s.04')]
>>> wn.synsets('able', pos=wn.ADJ)
[Synset('able.a.01'), Synset('able.s.02'), Synset('able.s.03'), Synset('able.s.04')]
>>> wn.synsets('able', pos=wn.ADJ_SAT)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/nltk/corpus/reader/wordnet.py", line 1413, in synsets
    for form in self._morphy(lemma, p)
  File "/usr/local/lib/python2.7/dist-packages/nltk/corpus/reader/wordnet.py", line 1627, in _morphy
    substitutions = self.MORPHOLOGICAL_SUBSTITUTIONS[pos]
KeyError: u's'

如果我们查看

\u morphy（）

函数，请参见

我们看到它从

substitutions=self.morphical\u substitutions[pos]

检索一些替换规则，以在检索以“based”/“root”形式存储的语法集之前执行一些形态学约简。例如

>>> from nltk.corpus import wordnet as wn
>>> wn._morphy('dogs', 'n')
[u'dog']

如果我们看一下

形态学替换

，我们会发现

ADJ_SAT

缺失，请参见：

因此，为了防止这种情况发生，需要进行一个简单的修复，将该行添加到的第1609行之后：

概念验证：

>>> MORPHOLOGICAL_SUBSTITUTIONS = {
...     1: [('s', ''), ('ses', 's'), ('ves', 'f'), ('xes', 'x'),
...            ('zes', 'z'), ('ches', 'ch'), ('shes', 'sh'),
...            ('men', 'man'), ('ies', 'y')],
...     2: [('s', ''), ('ies', 'y'), ('es', 'e'), ('es', ''),
...            ('ed', 'e'), ('ed', ''), ('ing', 'e'), ('ing', '')],
...     3: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')],
...     4: []}
>>> 
>>> MORPHOLOGICAL_SUBSTITUTIONS[5] = MORPHOLOGICAL_SUBSTITUTIONS[3]
>>> MORPHOLOGICAL_SUBSTITUTIONS
{1: [('s', ''), ('ses', 's'), ('ves', 'f'), ('xes', 'x'), ('zes', 'z'), ('ches', 'ch'), ('shes', 'sh'), ('men', 'man'), ('ies', 'y')], 2: [('s', ''), ('ies', 'y'), ('es', 'e'), ('es', ''), ('ed', 'e'), ('ed', ''), ('ing', 'e'), ('ing', '')], 3: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')], 4: [], 5: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')]}

---

感谢您在提出的问题中采纳的建议：

>>> from nltk.corpus import wordnet as wn
>>> wn._morphy('dogs', 'n')
[u'dog']

MORPHOLOGICAL_SUBSTITUTIONS = {
    NOUN: [('s', ''), ('ses', 's'), ('ves', 'f'), ('xes', 'x'),
           ('zes', 'z'), ('ches', 'ch'), ('shes', 'sh'),
           ('men', 'man'), ('ies', 'y')],
    VERB: [('s', ''), ('ies', 'y'), ('es', 'e'), ('es', ''),
           ('ed', 'e'), ('ed', ''), ('ing', 'e'), ('ing', '')],
    ADJ: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')],
    ADV: []}

MORPHOLOGICAL_SUBSTITUTIONS[ADJ_SAT] = MORPHOLOGICAL_SUBSTITUTIONS[ADJ]

>>> MORPHOLOGICAL_SUBSTITUTIONS = {
...     1: [('s', ''), ('ses', 's'), ('ves', 'f'), ('xes', 'x'),
...            ('zes', 'z'), ('ches', 'ch'), ('shes', 'sh'),
...            ('men', 'man'), ('ies', 'y')],
...     2: [('s', ''), ('ies', 'y'), ('es', 'e'), ('es', ''),
...            ('ed', 'e'), ('ed', ''), ('ing', 'e'), ('ing', '')],
...     3: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')],
...     4: []}
>>> 
>>> MORPHOLOGICAL_SUBSTITUTIONS[5] = MORPHOLOGICAL_SUBSTITUTIONS[3]
>>> MORPHOLOGICAL_SUBSTITUTIONS
{1: [('s', ''), ('ses', 's'), ('ves', 'f'), ('xes', 'x'), ('zes', 'z'), ('ches', 'ch'), ('shes', 'sh'), ('men', 'man'), ('ies', 'y')], 2: [('s', ''), ('ies', 'y'), ('es', 'e'), ('es', ''), ('ed', 'e'), ('ed', ''), ('ing', 'e'), ('ing', '')], 3: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')], 4: [], 5: [('er', ''), ('est', ''), ('er', 'e'), ('est', 'e')]}