问题描述
我正在尝试在 Windows 7 上编写一个 Python 脚本,它读取命令 ipconfig/displaydns
的输出并尝试从输出中获取一些值.
I am trying to write a Python script on Windows 7, which reads the output of command ipconfig /displaydns
and try to get some values from the output.
ipconfig/displaydns"
的输出是这样的,
Windows IP Configuration
9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.
Record Name . . . . . : 9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.
Record Type . . . . . : 1
Time To Live . . . . : 294
Data Length . . . . . : 4
Section . . . . . . . : Answer
A (Host) Record . . . : 127.0.0.16
我正在获取这个输出并将其保存在一个变量中,如下所示,
I am taking this output and saving it in a variable as below,
output = subprocess.check_output("ipconfig /displaydns", shell=True)
当我打印输出"时,我得到以下内容
When I print "output" I get the following
b'\r\nWindows IP Configuration\r\n\r\n 9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.\r\n ----------------------------------------\r\n Record Name . . . . . : 9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.\r\n Record Type . . . . . : 1\r\n Time To Live . . . . : 289\r\n Data Length . . . . . : 4\r\n Section . . . . . . . : Answer\r\n A (Host) Record . . . : 127.0 .0.16\r\n\r\n\r\n'
从这个输出中,我对 A (Host) Record
和 Record Name
的值感兴趣,它们是 127.0.0.16
和 >9.acex-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.
.
From this output I am interested in the values for A (Host) Record
and Record Name
which are 127.0.0.16
and 9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.
respectively.
我将如何在 Python 中做到这一点?
How would I do it in Python?
推荐答案
import subprocess
output = subprocess.check_output("ipconfig /displaydns", shell=True)
result = {}
for row in output.split('\n'):
if ': ' in row:
key, value = row.split(': ')
result[key.strip(' .')] = value.strip()
print(result)
print(result['A (Host) Record'])
给出:
{'A (Host) Record': '127.0 .0.16', 'Data Length': '4', 'Section': 'Answer', 'Record Name': '9.a.c.e.x-0.19-430f5091.531.1518.1b8d.2f4a.210.0.k1m2t5a3245k242qmfp75spjkv.avts.', 'Time To Live': '289', 'Record Type': '1'}
127.0 .0.16
另一种解决方案是:(当我在脑海中想到这一点时,我认为它会更紧凑......它不是,但无论如何,这是一种调用外部命令的不同方式,您可以在其中控制错误和输出(您可以区分两者))
Another solution would be to:(when i thought of this in my head, i thought it would be more compact.. it wasn't but anyway, it's a different way of calling the external command where you get control of the errors and output (you can differntiate the two))
import subprocess
cmdpipe = subprocess.Popen("ipconfig /displaydns", stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
result = {}
for row in cmdpipe.stdout.readline():
if ': ' in row:
key, value = row.split(': ')
result[key.strip(' .')] = value.strip()
# You need to close the file handles, as they will stay open "forever" otherwise.
cmdpipe.stdout.close()
cmdpipe.stderr.close()
print(result)
print(result['A (Host) Record'])
我还要补充一点,使用 shell=True
可能很危险,尤其是结合使用时与用户输入.它确实增加了一些隐藏的魔法"使某些事情变得更容易或更自然.但在大多数情况下,你会想要执行 subprocess.Popen(["ipconfig", "/displaydns"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
代替.
I'll also add that using shell=True
might be dangerous especially when combined with user-input. It does add some "hidden magic" to make some things easier or more user-natural. But in most cases you will want to do subprocess.Popen(["ipconfig", "/displaydns"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
instead.
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