python 模糊匹配

import re

def fuzzyfinder(input, collection, accessor=lambda x: x):
"""
Args:
input (str): A partial string which is typically entered by a user.
collection (iterable): A collection of strings which will be filtered
based on the `input`.
Returns:
suggestions (generator): A generator object that produces a list of
suggestions narrowed down from `collection` using the `input`.
"""
suggestions = []
input = str(input) if not isinstance(input, str) else input
pat = '.*?'.join(map(re.escape, input))
regex = re.compile(pat)
for item in collection:
r = regex.search(accessor(item))
if r:
suggestions.append((len(r.group()), r.start(), accessor(item), item))

return (z[-1] for z in sorted(suggestions))