Python读取文件并打印

时间:2016-04-20 00:23:40

标签: python python-2.7 python-3.x

您好我正在阅读以下格式的文件data.txt。

    Last table change time   : 6:55:12 ago
    Number of table inserts  : 3
    Number of table deletes  : 0
    Number of table drops    : 0
    Number of table age-outs : 0

    Port       Neighbor Device ID             Neighbor Port ID           TTL
    Et1        Arista2                        Ethernet1                  120
    Et2        Arista2                        Ethernet2                  120
    Ma1        Arista2                        Management1                120

我需要提取数据并将其打印为

Et1, Arista2, Ethernet1
Et2, Arista2, Ethernet2
Ma1, Arista2, Management1

我使用以下代码,但我只能打印

('Et1','Et2','Ma1')

    with open('data.txt') as f:
        for x in xrange(6):
            next(f)
        for line in f:
            print zip(*[line.split() for line in f])[0]
        f.close()

2 个答案:

答案 0 :(得分:1)

您可以借助一点正则表达式提取所需的内容。

请尝试以下代码段:

import re

with open('input.txt','r') as fp:
    for x in xrange(7):
        next(fp)

    rx = "\w+"
    for line in fp:
        data = re.findall(u"\w+", line, re.DOTALL)
        if data:
            print(', '.join(data[0:-1]))

根据文件内容和格式,将打印

Et1, Arista2, Ethernet1
Et2, Arista2, Ethernet2
Ma1, Arista2, Management1

答案 1 :(得分:1)

试试这个:

with open('tesxt.txt') as f:
    for line in f:
        if all(i not in line for i in ['Number', 'Last']) and line !='\n':
            print(line.strip().split()[:3])

它应该有效,因为您知道NumberLast不在您需要打印的行中。没有必要写一个正则表达式