字符串中的Python正则表达式搜索
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Python regex search in string
提问by Airwavezx
I'm trying to locate a timestamp in a line using Python, I have the following code which I got from SO and Python Docs, but it doesn't seem to spot the desired substring.
我正在尝试使用 Python 在一行中找到时间戳，我从 SO 和 Python Docs 获得了以下代码，但它似乎没有找到所需的子字符串。
import re
line = "Jan 3 07:57:39 Kali sshd[1397]: Failed password for root from 172.16.12.55 port 34380 ssh2"
regex = "[0-9]{2}:[0-9]{2}:[0-9]{2}"
p = re.compile(regex)
m = p.match(line)
print m
# Output: None
My goal is to extract the timestamp from the line according to the regexprovided.
我的目标是根据regex提供的行从行中提取时间戳。
Thank you.
谢谢你。
Duplicate: The question (which this is a duplicate of) offers the answer to my question, but it's still a different question. I think it's best to keep this one as well out of consideration for people like me in the future, as I wasn't able to find the answer *QUICKLY*through Python Manual & previous SO questions.
重复：这个问题（这是重复的）为我的问题提供了答案，但它仍然是一个不同的问题。我认为最好不要让像我这样的人将来考虑这个问题，因为我无法通过 Python 手册和以前的 SO 问题*快速*地找到答案。
回答by Ajax1234
You can use re.findall:
您可以使用re.findall：
import re
line = "Jan 3 07:57:39 Kali sshd[1397]: Failed password for root from 172.16.12.55 port 34380 ssh2"
new_line = re.findall('^[a-zA-Z]+\s+\d+\s+[\d\:]+', line)[0]
Output:
输出：
'Jan 3 07:57:39'
回答by Luca
You should try re.findall
你应该试试 re.findall
import re
line = "Jan 3 07:57:39 Kali sshd[1397]: Failed password for root from172.16.12.55 port 34380 ssh2"
pattern = "[0-9]{2}:[0-9]{2}:[0-9]{2}"
matches = re.findall(pattern, line)
for match in matches:
print(match)
