python - 正则表达式 findall start() 和 end() ？ Python

Question

我正在尝试使用 re.findall 按顺序获取查询的开始和结束位置

import re

sequence = 'aaabbbaaacccdddeeefff'

query = 'aaa'

findall = re.findall(query,sequence)

>>> ['aaa','aaa']

我如何获得类似 findall.start() 或 findall.end() 的东西？

我想得到

start = [0,6]
end = [2,8]

我知道

search = re.search(query,sequence)

print search.start(),search.end()

>>> 0,2

只会给我第一个实例

Answer 1

使用 re.finditer :

>>> import re
>>> sequence = 'aaabbbaaacccdddeeefff'
>>> query = 'aaa'
>>> r = re.compile(query)
>>> [[m.start(),m.end()] for m in r.finditer(sequence)]
[[0, 3], [6, 9]]

来自文档:

Return an iterator yielding MatchObject instances over all non-overlapping matches for the RE pattern in string. The string is scanned left-to-right, and matches are returned in the order found.