python - 如何仅打印文件中的匹配行？

Question

import re
shakes = open("output.txt", "r")
for line in shakes:
    if re.match(r'.*(\w*Daemon\w*).*', line):
        print(line)
        break
    else:
        print("none")

输出：

none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
none
local1.crit: Aug 23 09:08:42 abvlab_ confd[860]: - Daemon n_7 died

标签： pythonpython-3.x

Answer 1

例如，您可以这样做：

matching_shakes = list(filter(lambda line: re.match(regex, line), shakes))