我在 .txt 文件中有這段文字：crt - 00:00:00 up 200 days, 23:35, 0 users, load average: 0.04, 0.05, 0.02Tasks: 300 total, 2 running, 298 sleeping, 0 stopped, 0 zombieCpu(s): 12.0%us, 2.5%sy, 0.0%ni, 89.2%id, 0.0%hi, 0.1%si, 0.0%stMem: 123456K total, 1234567k used, 989991k free, 11156793k buffersSwap: 456K total, 30897564k used, 785431k free, 23445897k cachedPID User Pr NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND24 455 36 63 700 800 900 456 87 35 462 root 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 threadcrt - 00:00:04 up 200 days, 23:39, 0 users, load average: 0.04, 0.05, 0.02Tasks: 300 total, 2 running, 298 sleeping, 0 stopped, 0 zombieCpu(s): 12.0%us, 2.5%sy, 0.0%ni, 89.2%id, 0.0%hi, 0.1%si, 0.0%stMem: 123456K total, 1234567k used, 989991k free, 11156793k buffersSwap: 456K total, 30897564k used, 785431k free, 23445897k cached我想要所有段落中的所有數字值，crt并且不包括和cached之間的值。直到現在我正在使用這個：PIDthreadregex.findall(r'(?<!\d)(?<=\bcrt\b.*?)(?:\d{2}:\d{2}(?::\d{2})?|\d*\.?\d+)(?!\d)(?=.*\bcached\b)', text, regex.S)但這給出了所有數字，包括PID和之間thread。有任何想法嗎？
2 回答
長風秋雁
TA貢獻1757條經驗 獲得超7個贊
由于您已經在使用該regex模塊（支持變量后視），因此您也可以輕松使用\Gand ：\K
(?:^crt|\G(?!\A))(?:(?!^$)\D)*\K[.:\d]+
眼眸繁星
TA貢獻1873條經驗 獲得超9個贊
分解來看，這假設了幾件事：
(?:
^crt # start a line with crt
| # or
\G(?!\A) # start after thre previous match (unless it is the very start of the string)
)
(?:(?!^$)\D)*\K # match any non-digit character, but stop at empty lines
[.:\d]+ # character class with ., : and digits
在Python代碼中可以是：
import regex as re
junk = """
crt - 00:00:00 up 200 days, 23:35, 0 users, load average: 0.04, 0.05, 0.02
Tasks: 300 total, 2 running, 298 sleeping, 0 stopped, 0 zombie
Cpu(s): 12.0%us, 2.5%sy, 0.0%ni, 89.2%id, 0.0%hi, 0.1%si, 0.0%st
Mem: 123456K total, 1234567k used, 989991k free, 11156793k buffers
Swap: 456K total, 30897564k used, 785431k free, 23445897k cached
PID User Pr NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
24 455 36 63 700 800 900 456 87 35 46
2 root 80 0 0 0 0 0 0 0 0 0 0 0 0 0 0 thread
crt - 00:00:04 up 200 days, 23:39, 0 users, load average: 0.04, 0.05, 0.02
Tasks: 300 total, 2 running, 298 sleeping, 0 stopped, 0 zombie
Cpu(s): 12.0%us, 2.5%sy, 0.0%ni, 89.2%id, 0.0%hi, 0.1%si, 0.0%st
Mem: 123456K total, 1234567k used, 989991k free, 11156793k buffers
Swap: 456K total, 30897564k used, 785431k free, 23445897k cached
"""
rx = re.compile(r'(?:^crt|\G(?!\A))(?:(?!^$)\D)*\K[.:\d]+', re.M)
for match in rx.finditer(junk):
print(match.group(0))
產量（縮寫）：
00:00:00
200
23:35
...
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