初学 Python ,求大佬指导个 Python 思路 https://www.v2ex.com/t/396718

ip_mask.py

import sys


def main(fp):
    print('ip\tmask')
    with open(fp, 'r') as fh:
        for line in fh:
            line_trim = line.strip()
            if line_trim.startswith('ip address'):
                lst = line_trim.split()
                ip, mask = lst[2], lst[3]
                print('{}\t{}'.format(ip, mask))


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print("usage: {} <ip_file>".format(sys.argv[0]))
        sys.exit(1)
    main(sys.argv[1])

python ip_mask.py ip.txt
# 输出
ip      mask
192.168.234.17  255.255.255.240
192.168.23.65   255.255.255.192
192.168.4.1     255.255.255.0