如何向spaCy的标点符号功能添加自定义符号？

import spacy
from spacy.symbols import ORTH, POS

nlp = spacy.load('en_core_web_sm')

custom_punctuations = {
    "—": [{ORTH: "—"}],
    "…": [{ORTH: "…"}],
    # 添加更多自定义符号
}

custom_pos_tags = {
    "—": [{POS: "PUNCT"}],
    "…": [{POS: "PUNCT"}],
    # 添加更多自定义符号的词性标签
}

for punct, values in custom_punctuations.items():
    nlp.tokenizer.add_special_case(punct, values)

for punct, values in custom_pos_tags.items():
    nlp.vocab[punct].set_attrs(values)

text = "This is a sentence—containing custom punctuation…"
doc = nlp(text)

for token in doc:
    print(token.text, token.pos_)