Question

我正在解析一些日志，并希望提取某种类型的所有参数名称。为简单起见，我只需要包含一个小子串。

log = 'WT.tz=-8&WT.bh=23&WT.ul=en-US'

#I want to find all strings that start with WT and get WT and all the following characters until I find an & or the end of the string. I tested this on an online regex page and it seems to work great.
regex = r'(?s)(?=WT).+?(?=(=))'

# if I try to find the first I get what I expected
re.search(regex,log).group()
>> 'WT.tz'

#when I try to find all I do not get what I thought I was going to get.
re.findall(regex,log)
>> ['=','=','=']

Answer 1

findall会返回所有groups。您有一个组(=)。请将其删除。

regex = r'(?s)WT.+?(?==)'

                   ^^^^^

此外，不需要lookahead。

输出：['WT.tz', 'WT.bh', 'WT.ul']

Answer 2

log = 'WT.tz=-8&WT.bh=23&WT.ul=en-US'

print(re.findall(r'WT\.[^&]*\b',log))

['WT.tz=-8', 'WT.bh=23', 'WT.ul=en-US']

Python regex group（）有效，但findall（）结果并不像我预期的那样

2 个答案: