Python在字符串中搜索值

Question

我有一个像这样的字符串：

STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT evictions 0
STAT reclaimed 0
END

我正在尝试获取curr_items的值，到目前为止，我已经

out = telnet.read_until("END")
req = re.search("curr_items", out).group(0).split()[0]

哪个返回curr_items，如何获取值？

谢谢

Answer 1

您可以将与该值匹配的捕获组添加到正则表达式中：

>>> int(re.search("curr_items (\d+)", out).group(1))
0

Answer 2

re.search("curr_items [0-9]*", out).group(0).split()[1]

Answer 3

try:
    req = int(re.search("(?<=curr_items)\s*([\d]*)", out).group(0))
except:
    # No value was found.
    req = defaultValue