给出词汇表列表:
glossaries = ['USA', '34']
目标是使用词汇表中的项目,并使用词汇表作为分隔符分割字符串。例如。给定字符串和词汇表,可以使用_isolate_glossaries()
函数:
glossaries = ['USA', '34']
word = '1934USABUSA'
_isolate_glossaries(word, glossaries)
应输出:
['19', '34', 'USA', 'B', 'USA']
我尝试过:
def isolate_glossary(word, glossary):
print(word, glossary)
# Check that word == glossary and glossary not in word
if re.match('^{}$'.format(glossary), word) or not re.search(glossary, word):
return [word]
else:
segments = re.split(r'({})'.format(glossary), word)
segments, ending = segments[:-1], segments[-1] # Remove the last catch with null string.
return segments
def _isolate_glossaries(word, glossaries):
word_segments = [word]
for gloss in glossaries:
word_segments = [out_segment
for segment in word_segments
for out_segment in isolate_glossary(segment, gloss)]
return word_segments
它可以工作,但看起来有点令人费解,无法进行如此多级别的循环和正则表达式拆分。 是否有更好的方法根据词汇表拆分字符串?
答案 0 :(得分:2)
要按列表中的项目拆分字符串,请动态创建一个正则表达式,其中包括用管道|
分隔的项目,这些项目都包含在捕获组中(非捕获组本身不包括项目在输出中):
list = re.split('({})'.format('|'.join(glossaries)), word);
print ([x for x in list if x]) # filter non-word items