当关键字是多个单词时，可以有效地搜索关键字

您的要求听起来像是全文搜索任务。有一个名为whoosh的Python搜索包。可以像下面那样在内存中对@derek的主体进行索引和搜索。

from whoosh.filedb.filestore import RamStorage
from whoosh.qparser import QueryParser
from whoosh import fields


texts = [
    "Here's a sentence with dog and apple in it",
    "Here's a sentence with dog and poodle in it",
    "Here's a sentence with poodle and apple in it",
    "Here's a dog with and apple and a poodle in it",
    "Here's an apple with a dog to show that order is irrelevant"
]

schema = fields.Schema(text=fields.TEXT(stored=True))
storage = RamStorage()
index = storage.create_index(schema)
storage.open_index()

writer = index.writer()
for t in texts:
    writer.add_document(text = t)
writer.commit()

query = QueryParser('text', schema).parse('dog apple')
results = index.searcher().search(query)

for r in results:
    print(r)

这将产生：

<Hit {'text': "Here's a sentence with dog and apple in it"}>
<Hit {'text': "Here's a dog with and apple and a poodle in it"}>
<Hit {'text': "Here's an apple with a dog to show that order is irrelevant"}>

您还可以FileStorage按照如何建立文档索引中所述使用持久化索引。