python - Python regex group()可以工作，但是findall()的结果与我预期的不一样

我正在解析一些日志，并想提取某种类型的所有参数名称。为简单起见，我将只包含一个小的子字符串。

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)
>> ['=','=','=']

最佳答案

findall返回所有groups。您有一个(=)组，因此将其删除。

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

                   ^^^^^

同样也不需要lookahead。

输出：['WT.tz', 'WT.bh', 'WT.ul']

关于python - Python regex group()可以工作，但是findall()的结果与我预期的不一样，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33021805/