Question

我正在阅读一个包含以下数据列表的远程文件：

HTTP threads 200
HornetQ Server threads 100
HornetQ Client threads 16
Default threads 22
OOB threads 20

我使用以下python代码远程读取文件：

import subprocess
import sys

HOST="myhost"

COMMAND="cat /space/monitor/monitor.log"

ssh = subprocess.Popen(["ssh", "%s" % HOST, COMMAND],
                       shell=False,
                       stdout=subprocess.PIPE,
                       stderr=subprocess.PIPE)
result = ssh.stdout.read().splitlines()
if result == []:
    error = ssh.stderr.readlines()
    print >>sys.stderr, "ERROR: %s" % error
else:
    print result

代码的输出显示没有回车符的行列表：

'Thu Jul 2 13:25:01 CEST 2015', 'HTTP threads 200', 'HornetQ Server threads 100', 'HornetQ Client threads 14', 'Default threads 22', 'OOB threads 20', 'Remoting threads 12', 'Thu Jul 2 13:30:01 CEST 2015', 'HTTP threads 200', 'HornetQ Server threads 100', 'HornetQ Client threads 17', 'Default threads 22', 'OOB threads 20', 'Remoting threads 12', 'Thu Jul 2 13:35:01 CEST 2015', 'HTTP threads 200', 'HornetQ Server threads 100', 'HornetQ Client threads 13', 'Default threads 22', 'OOB threads 20', 'Remoting threads 12', 'Thu Jul 2 13:40:01 CEST 2015', 'HTTP threads 200', 'HornetQ Server threads 100', 'HornetQ Client threads 11', 'Default threads 22', 'OOB threads 20', 'Remoting threads 12',

更新：我第一次尝试使用：

result = ssh.stdout.readlines()

然而，这产生了＆＃34; \ n＆＃34;取代回车：

 20\n', 'Remoting threads 12\n', 'Thu Jul 2 13:55:01 CEST 2015\n', 'HTTP threads 200\n', 'HornetQ Server threads 100\n', 'HornetQ Client threads 12\n', 'Default threads 22\n', 'OOB threads 20\n', 'Remoting threads 12\n', 'Thu Jul 2 14:00:01 CEST 2015\n', 'HTTP threads 200\n', 'HornetQ Server threads 100\n', 'HornetQ Client threads 12\n', 'Default threads 22\n', 'OOB threads 20\n', 'Remoting threads 12\n', 'Thu Jul 2 14:05:01 CEST 2015\n', 'HTTP threads 200\n', 'HornetQ Server threads 100\n', 'HornetQ Client threads 15\n', 'Default threads 22\n', 'OOB threads 20\n', 'Remoting threads 12\n']

我认为分裂线可以解决它 - 但它只是取代了＆＃34; \ n＆＃34;用空字符串。

谢谢

Answer 1

splitlines()的文档很清楚：

换行符不包含在结果列表中，除非给出了keepends并且为true。

所以尝试改变这个：

result = ssh.stdout.read().splitlines()

为：

result = ssh.stdout.read().splitlines(True)

当然，您也可以使用join()

加入这些行

lines = "\r".join(result)

分隔符可以是任何东西，例如回车。

Answer 2

鉴于您的新问题描述：

fullstring = ssh.stdout.read() ## will contain all the /bytes/ from stdout
split = fullstring.split('\r') ## will make substrings without the trailing `\r`
fullsplits = [s + '\r' for s in split] ## adding the \r back to the strings

Answer 3

尝试用逗号+回车符替换逗号

result = str(result)
result = result.replace(",",",\n")

Answer 4

好吧，你具体告诉python摆脱它：

result = ssh.stdout.read().splitlines()

将事物分成几行，消耗掉行符号。不要那样做，你会没事的。

Answer 5

splitlines有一个可选参数 - keepends。见https://docs.python.org/2/library/stdtypes.html

你必须调用splitlines（True）

读取远程文件时回车丢失

5 个答案: